STANDSTILL AGREEMENT

                  This STANDSTILL AGREEMENT (this "Agreement"), dated as of June
30, 1998, by and among Radio One,  Inc., a Delaware  corporation  ("Radio One");
the  subsidiaries  of  Radio  One from  time to time  party  hereto  and who are
guarantors of the Senior  Indebtedness (as defined below) (herein referred to as
the "Subsidiaries" and collectively,  with Radio One hereinafter  referred to as
the  "Companies,"  and  individually  as a "Company");  ALTA  Subordinated  Debt
Partners  III,  L.P.,  BancBoston  Investments,  Inc.,  Grant M. Wilson,  Syncom
Capital  Corporation,  Alliance  Enterprise  Corporation,   Opportunity  Capital
Corporation,   Capital   Dimensions   Venture  Fund,  Inc.,  TSG  Ventures  L.P.
(successor-in-interest   to  TSG  Ventures   Inc.),   Fulcrum   Venture  Capital
Corporation and Alfred C. Liggins (successor-in-interest to Greater Philadelphia
Venture Capital  Corporation,  Inc.) (together with their respective  successors
and assigns,  each an "Investor" and  collectively the  "Investors");  Alfred C.
Liggins,  Catherine  L.  Hughes  and Jerry A.  Moore III  (each,  a  "Management
Stockholder" and  collectively,  the "Management  Stockholders");  Credit Suisse
First  Boston,  as Agent  ("Agent")  for  itself  and the other  Senior  Lenders
(hereinafter  defined);  and United States Trust Company of New York, as trustee
(the "Trustee") for the holders (the "Senior  Subordinated  Noteholders") of the
12% Senior Subordinated Notes due 2004 from Radio One in the aggregate principal
amount  of  $85,478,000  (the  "Senior  Subordinated  Notes")  issued  under the
Indenture dated as of May 15, 1997 (as amended, modified, restated supplemented,
renewed, replaced, extended,  increased,  rearranged or substituted from time to
time, the "Indenture").

                                   WITNESSETH:

                  WHEREAS,  in connection  with the closing of the  transactions
contemplated  by that certain Stock Purchase  Agreement dated as of December 23,
1997 by and among the Shareholders of Bell  Broadcasting  Company and Radio One,
Radio One  desires to replace its Amended and  Restated  Credit  Agreement  (the
"NationsBank  Agreement"),  dated as of May 19, 1997, with NationsBank of Texas,
N.A.  ("NationsBank")  and the several lenders from time to time parties thereto
with a Credit Agreement (as amended, modified,  restated supplemented,  renewed,
replaced, extended, increased,  rearranged or substituted from time to time, the
"Senior  Credit  Agreement"),  dated of even date  herewith,  with Credit Suisse
First  Boston  ("CSFB"),  as agent,  and the several  lenders  from time to time
parties thereto.

                  WHEREAS,   the  Companies,   the  Investors,   the  Management
Stockholders,  NationsBank,  as agent under the  NationsBank  Agreement  and the
Trustee are parties to that certain  Standstill  Agreement  (the "NB  Standstill
Agreement") effective as of May 19, 1997.

                  WHEREAS,  this Agreement is entered into pursuant to the terms
of Section 15 of the NB  Standstill  Agreement  and replaces  the NB  Standstill
Agreement in its entirety.

                  In  order to  induce  the  Senior  Lenders  to make  financial
accommodations  to the Companies  and to enter into the Senior Credit  Agreement
and for other good and valuable consideration, the receipt and adequacy of which
are hereby acknowledged, the Companies, the


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Investors and the Management  Stockholders hereby agree with the Agent on behalf
of the Senior  Lenders,  and the Trustee,  on behalf of the Senior  Subordinated
Noteholders that, so long as any Senior Indebtedness (as hereinafter defined) is
outstanding  or committed to be advanced,  each such party will comply with such
of the following provisions as are applicable to it:

                  NOW,  THEREFORE,  for good  and  valuable  consideration,  the
receipt and  sufficiency  of which are hereby  acknowledged,  the parties hereto
agree as follows:

         1.       Certain Definitions.

                  1.1 Capitalized Terms. Except as otherwise defined herein, all
capitalized  terms used in this Agreement shall have the meanings  specified for
such terms in Appendix A.

                  1.2 Senior Indebtedness.  The term "Senior Indebtedness" shall
mean  any  and  all  loans,  advances,   extensions  of  credit  and  any  other
indebtedness, obligations and/or liabilities, now existing or hereafter arising,
direct or indirect,  absolute or contingent, of the Companies, or any of them to
(i) the Senior Lenders  outstanding  from time to time,  whether pursuant to the
Senior Credit Agreement, each Guaranty, any of the Notes, the Security Documents
or any other Loan Document or otherwise (including,  without limitation, any and
all indebtedness to the Senior Lenders in respect of any and all future loans or
advances or extensions of credit made to the  Companies,  or any of them, by the
Senior  Lenders prior to,  during or following any  proceeding in respect of any
"Reorganization",  as defined in Section  3.2  hereof,  together  with  interest
thereon and all fees,  expenses and other amounts (including costs of collection
and reasonable attorneys' fees) at any time owing to the Senior Lenders, whether
arising  in  connection  with the  Senior  Credit  Agreement,  the  Notes,  each
Guaranty,  the  Security  Documents  or any other Loan  Document,  or such other
indebtedness (all of the foregoing  sometimes referred to herein as the "Primary
Senior Indebtedness"), and (ii) the Senior Subordinated Noteholders from time to
time,  pursuant to the Indenture,  the Senior Subordinated Notes issued pursuant
thereto,   the  guaranties  of  the  Subsidiaries   with  respect  thereto  (the
"Subordinated Guaranties"), or otherwise, together with interest thereon and all
fees,  expenses and other amounts  (including costs of collection and reasonable
attorneys'  fees) at any  time  owing to the  Senior  Subordinated  Noteholders,
whether arising in connection with the Indenture, the Senior Subordinated Notes,
the  Subordinated  Guaranties  or any  other  document  executed  in  connection
therewith,  (regardless of the extent to which the Senior Credit Agreement,  the
Notes, each Guaranty, the Security Documents or any other Loan Document, or such
other  indebtedness,  or the  Indenture,  the Senior  Subordinated  Notes or the
Subordinated  Guaranties is enforceable  against the Companies and regardless of
the extent to which such amounts are allowed as claims  against the Companies in
any  Reorganization,  and  including  any interest  thereon  accruing  after the
commencement  of any  Reorganization  and any other  interest  that  would  have
accrued thereon but for the commencement of such Reorganization); provided, that
without  the prior  consent of  Investors  holding a majority in interest of the
Preferred  Stock,  the Senior Lenders shall not increase the principal amount of
borrowing  available to the Companies  under the Senior  Credit  Agreement to an
amount in excess of $57,500,000 and the Senior Subordinated Noteholders will not
increase the principal amount outstanding under the Senior  Subordinated  Notes.
All Senior

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Indebtedness  shall be entitled to the benefits of this Agreement without notice
thereof being given to the Investors.

                  1.3   Subordinated   Obligations.   The   term   "Subordinated
Obligations"  shall mean any and all existing and hereafter arising  obligations
and/or  liabilities  whatsoever  of the  Companies,  or any of them,  to (i) the
Investors in  connection  with the  Preferred  Stock,  whether  payments made in
respect of Liquidation Value or dividends of the Preferred Stock, indemnities or
otherwise  in respect  of such  Preferred  Stock,  whether  direct or  indirect,
absolute or contingent,  and all claims, rights, causes of action, judgments and
decrees  in  respect  of  the  foregoing,  including,  without  limitation:  all
indebtedness,  obligations  and/or  liabilities  arising under,  resulting from,
relating to or in connection with such Preferred  Stock,  and further  including
without  limitation  any amounts paid at any time to the  Investors  under or in
connection with provisions of the Securities Purchase Agreement or the Preferred
Stockholders'  Agreement and (ii) the Investors in connection with or under the,
the Warrant Agreement,  the Warrants,  any and all proxies granted in connection
therewith, and (iii) any indebtedness of the Company or any Subsidiary issued to
the  Investors,  if any and at any time,  in any  transaction  related  to or in
connection  with the Preferred  Stock or the Warrants,  and in each case any and
all  agreements or  instruments  securing any of the  obligations,  indebtedness
and/or liabilities evidenced by, arising under, resulting from or related to the
foregoing (all of the foregoing,  together with any other  agreement,  document,
instrument, certificate or proxy evidencing or relating to any of the foregoing,
the  transactions  contemplated  therein or the Subordinated  Obligations  being
hereinafter collectively referred to as the "Subordinated Agreements").

         2.       Representations and Warranties.

         (a) The Company and each Management  Shareholder  hereby represents and
         warrants to the Agent, the Senior Lenders,  the Trustee and each Senior
         Subordinated Noteholder that:

                  (i) At the date  hereof (i) the total  number of shares of 15%
         Series A Preferred Stock  authorized by Radio One, held by the Series A
         Investors,  is  100,000  shares,  par  value  $.01 per  share;  with an
         aggregate Liquidation Value for all such Series A Preferred Stock equal
         to  $8,475,303.00;  and (ii) the total number of shares of 15% Series B
         Preferred  Stock  authorized  by the  Company,  held  by the  Series  B
         Investors,  is  150,000  shares,  par  value  $.01 per  share,  with an
         aggregate Liquidation Value for all such Series B Preferred Stock equal
         to $12,446,710.00.  At the date hereof, no dividends have been declared
         or  have  accrued  with  respect  to the  Preferred  Stock.  All of the
         Investors  holding  Series A  Preferred  Stock are listed on Exhibit A,
         under the caption "Series A Preferred Investors";  all of the Investors
         holding  Series B  Preferred  Stock are  listed on Exhibit A, under the
         caption "Series B Preferred  Investors".  All of the Investors  holding
         warrants are listed on Exhibit A, under the caption "Warrantholders".

                  (ii) True,  accurate and complete  copies of the  Subordinated
         Agreements are attached hereto as Exhibit B; and

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         (b) Each  Investor  hereby  represents  and warrants to the Agent,  the
         Senior Lenders, the Trustee and each Senior Subordinated Noteholder
         that:

                  (i) Each Investor is the holder of the Preferred Stock held by
         it, and in the case of Investors  owning Warrants,  the Warrants,  free
         and clear of all liens,  claims and encumbrances,  and such Investor is
         not subject to any  contractual  limitation or restriction  which would
         impair in any way its  ability to execute  or perform  its  obligations
         under this Agreement.

                  (ii) Each Investor hereby consents to the Companies  incurring
         the Senior  Indebtedness,  including,  without  limitation,  all future
         loans and  extensions  of credit by the Senior  Lenders  and the Senior
         Subordinated  Noteholders  to the  Companies  (to the extent  permitted
         hereunder), or any of them, for all purposes for which such consent may
         be required under the Subordinated Agreements or otherwise;

                  (iii) Such Investor has no liens on, security interests in, or
         other rights to any of the assets of the Companies.

         3.       Terms of Subordination.

                  3.1 No  Transfer.  The  Investors  will not sell or  otherwise
dispose of any of the Subordinated Obligations,  including,  without limitation,
the  Preferred  Stock or the  Warrants,  except  with the  consent of the Senior
Lenders (which consent shall not be unreasonably withheld);  provided,  however,
that the Investors  may sell or transfer the Preferred  Stock or the Warrants to
an Affiliate,  or any partner of any Investor  existing on the date hereof or as
required  by law or  regulation.  In all  cases,  prior to any  transfer  of the
Preferred  Stock or the Warrants,  or any other  Subordinated  Obligation,  each
transferee  thereof  must (a)  agree  in  advance  in  writing,  pursuant  to an
agreement in form acceptable to the Senior Lenders, to become a party hereto and
(b)  pledge to Agent  and the  Senior  Lenders,  in  advance,  any  Warrants  so
transferred pursuant to a pledge agreement in form acceptable to Senior Lenders.
The  Investors  shall give the Senior  Lenders at least  thirty  (30) days prior
written  notice  of any such  proposed  transfer  stating  the  identity  of the
transferee  and providing  such other  information  as the Senior  Lenders shall
reasonably require.

                  3.2 Payment  Subordinated.  (a)  Anything in the  Subordinated
Agreements to the contrary  notwithstanding,  each Investor hereby  subordinates
and defers the payment of the  Subordinated  Obligations,  and the  Subordinated
Obligations  are and shall be hereby made  expressly  subordinate  and junior in
right of payment to the prior indefeasible payment in full in cash of the Senior
Indebtedness  and termination of the Senior Credit  Agreement and the Indenture,
and the Subordinated  Obligations are hereby subordinated as a claim against the
Companies and the Management  Stockholders (relating to the Senior Indebtedness)
or any of the assets of, or ownership  interests in, the Companies  whether such
claim be (i) in the event of any  distribution  of the assets of a Company  upon
any  voluntary  or  involuntary  dissolution,   winding-up,   total  or  partial
liquidation or reorganization, or bankruptcy, insolvency,  receivership or other
statutory or common law

                                        4



proceedings  or  arrangements  involving  a Company or the  readjustment  of the
liabilities  of a Company or any  assignment for the benefit of creditors or any
marshaling of the assets or liabilities of a Company (any of the foregoing being
hereinafter referred to as a  "Reorganization"),  (ii) in connection with a sale
of the Companies  pursuant to the Subordinated  Agreements or otherwise or (iii)
other than in connection with any  Reorganization or any such sale, to the prior
indefeasible  payment in full in cash of the Senior Indebtedness and termination
of the  Senior  Credit  Agreement  and  the  Indenture.  In  furtherance  of the
foregoing,  except as provided in Section 3.6  hereof,  the  Companies  will not
make,  and no holder of  Subordinated  Obligations  will accept or receive,  any
payment of Subordinated  Obligations until all the Senior  Indebtedness has been
indefeasibly  paid and satisfied in full in cash and the Senior Credit Agreement
and the Indenture have been terminated.

                  (b)  Further,  so long as any Claim (as  defined  in Section 5
hereof)  of Agent or any of the  Senior  Lenders  or the  Trustee  or any Senior
Subordinated   Noteholder   against  any  of  the   Companies,   the  Management
Stockholders  (relating to the Senior Indebtedness) or any portion of the Senior
Indebtedness  remains  outstanding or  unsatisfied,  and until the Senior Credit
Agreement and the Indenture have been  terminated,  each Investor agrees that it
shall not (i) exercise any of its rights under the Warrants or any other option,
warrant,  call or other  Right  (other  than,  subject to Section 8 hereof,  the
Investors'  rights under Articles VI and VIII of the Warrant Agreement and under
any irrevocable proxy granted to effectuate the Investors' rights under Articles
VI and VIII of the Warrant  Agreement) it may now have or hereafter acquire with
respect  to  any  portion  of  the  capital   stock  of  any  of  the  Companies
(collectively,  "Equity Rights"),  whether acquired pursuant to the Subordinated
Agreements  or otherwise (A) unless after the exercise of such Warrants or other
Equity Rights,  the Investors will not own, directly or indirectly,  65% or more
of Radio One or any other  Company  nor be entitled  to elect or  designate  for
election a majority of the Board of Directors of any Company, (B) if as a result
of such  exercise of the  Warrants or other  Equity  Rights,  Hughes and Liggins
shall not continue to directly own of record and beneficially and to control 35%
or more of Radio  One and the  Companies  or would not be  entitled  to elect or
designate  for  election a majority of the Board of Directors of any Company and
(C) so long as any capital stock to be issued in connection with the exercise of
its Warrant is required to be pledged to the Agent for the benefit of the Senior
Lenders,  unless such Investor  shall have first (x) notified the Senior Lenders
and the  Trustee of its desire to  exercise  its  Warrant,  (y)  instructed  and
notified  Radio One that any capital stock to be issued in  connection  with the
exercise of any Warrant of any Investor shall be delivered  directly to Agent as
security  for the  Primary  Senior  Indebtedness  and (z)  such  Investor  shall
simultaneously  pledge  such  capital  stock to the Agent for the benefit of the
Senior Lenders pursuant to a pledge agreement in form and substance satisfactory
to the Senior  Lenders  and deliver to Agent stock  powers  (executed  in blank)
covering  such capital  stock,  (ii) exercise any rights it now has or hereafter
acquires to require a Company to repurchase any of the Warrants  pursuant to the
Subordinated  Agreements or otherwise, or (iii) accept any sums in consideration
of repurchase of any of the Warrants.

                                        5



                  3.3 Distributions in  Reorganization.  (a) In the event of any
Reorganization relative to a Company or property of a Company, all of the Senior
Indebtedness  shall  first have been  indefeasibly  paid in full in cash and the
Senior Credit Agreement and the Indenture shall have been terminated  before any
payment  whatsoever is made upon or in respect of the  Subordinated  Obligations
(including  but not limited to payments on account of  redemption,  liquidation,
dividends,  or  principal,  premium,  interest  or  otherwise),  and in any such
proceedings  any payment or  distribution  of any kind or character  whatsoever,
whether in cash or property or securities which may be payable or deliverable in
respect of the Subordinated  Obligations shall be paid or delivered  directly to
the (i) Agent for the benefit of the Senior  Lenders for  application in payment
of the Primary Senior  Indebtedness,  unless and until the Investors  shall have
received  notice  in  writing  from  the  Agent  that all  such  Primary  Senior
Indebtedness shall have been indefeasibly paid and satisfied in full in cash and
the Senior Credit Agreement shall have been  terminated,  and (ii) thereafter to
the  Trustee,  for the  benefit  of the  Senior  Subordinated  Noteholders,  for
application  in  payment  of the  Senior  Subordinated  Notes  and all  monetary
obligations of any Company under the  Indenture,  unless and until the Investors
shall have  received  notice in writing  from the  Trustee  that all such Senior
Subordinated  Notes and all  monetary  obligations  under the  Indenture  of any
Company shall have been  indefeasibly paid and satisfied in full in cash and the
Indenture shall have been  terminated.  In the event that,  notwithstanding  the
foregoing,  upon any such Reorganization,  any payment or distribution of assets
of a Company of any kind or character  whatsoever,  whether in cash, property or
securities,  shall be  received  by any holder of the  Subordinated  Obligations
before all of the Senior  Indebtedness is indefeasibly  paid in full in cash and
the  Senior  Credit  Agreement  and the  Indenture  have  been  terminated,  the
Investors  agree  hereby  to cause all such  payments  and  distributions  to be
immediately  paid  over,  first,  to the Agent  for the  benefit  of the  Senior
Lenders,  for  application  to the  payment of all Primary  Senior  Indebtedness
remaining  unpaid until the Investors shall have received notice in writing from
the Agent that all such Primary Senior Indebtedness shall have been indefeasibly
paid in full in cash and the Senior Credit  Agreement has been  terminated,  and
second, to the Trustee for the benefit of the Senior  Subordinated  Noteholders,
for  application to the payment of all Senior  Subordinated  Notes and all other
monetary  obligations  of any Company under the  Indenture,  until the Investors
shall have  received  notice in writing  from the  Trustee  that all such Senior
Subordinated  Notes  and  such  other  monetary   obligations  shall  have  been
indefeasibly paid in full in cash and the Indenture has been terminated.

                  (b)  Until  such  time as the  Senior  Indebtedness  has  been
indefeasibly  paid and satisfied in full in cash and the Senior Credit Agreement
and the Indenture shall have been terminated,  each of the Investors irrevocably
authorizes and empowers the Agent, on behalf of the Senior Lenders,  and at such
time as the Primary Senior  Indebtedness  shall have been  indefeasibly  paid in
full,  the Trustee,  on behalf of the Senior  Subordinated  Noteholders,  in any
proceedings under any  Reorganization  (i) to file a proof of claim on behalf of
any or all of the Investors with respect to the Subordinated  Obligations if any
such  Investor  fails to file  proof of its claims  prior to 30 days  before the
expiration of the time period  during which such claims must be submitted,  (ii)
to accept  and  receive  any  payment  or  distribution  which may be payable or
deliverable  at any time upon or in  respect of such  Subordinated  Obligations,
provided that at such time as the Primary  Senior  Indebtedness  shall have been
indefeasibly  paid in full,  amounts  received  thereafter by the Agent, if any,
shall be  delivered  by the Agent to the  Trustee  for the benefit of the Senior
Subordinated

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Noteholders,  (iii) to prove any and all claims, or seek enforcement thereof, of
each of the  Investors in any  Reorganization  proceeding  and (iv) to take such
other action as may be reasonably  necessary to effectuate any of the foregoing.
Upon the Agent's or the  Trustee's  reasonable  request,  each  Investor  agrees
severally  and  not  jointly  to  provide  to the  Agent  and the  Trustee,  all
information  and documents  necessary to present  claims or prove claims or seek
enforcement thereof as aforesaid. The Investors shall retain the exclusive right
to vote their claims in any Reorganization;  provided, that no Investor shall be
entitled  to take any  action or vote in any way and each such  Investor  hereby
agrees  severally  and not jointly to not take any action or vote in any way, so
as to contest  (i) the  validity  or the  enforceability  of the  Senior  Credit
Agreement,  any of the other  Loan  Documents  or any of the  liens or  security
interests  which  secure  the  payment  or  performance  of the  Primary  Senior
Indebtedness,  (ii) the validity or the  enforceability  of the  Indenture,  the
Senior  Subordinated  Notes, the  Subordinated  Guaranties or any other document
executed in connection  therewith,  or (iii) the validity or  enforceability  of
this  Agreement  or any  agreement or  instrument  to the extent  evidencing  or
relating to the Senior  Indebtedness.  Neither the Agent and the Senior Lenders,
nor the Trustee and the Senior Subordinated  Noteholders,  shall in any event be
liable for any  failure to prove the  Subordinated  Obligations;  for failure to
exercise  any rights with  respect  thereto;  or for failure to collect any sums
payable  thereon or for  failure to take any  affirmative  action in  connection
therewith.

                  3.4  Effect  of  Provisions.   The  provisions  hereof  as  to
subordination  are solely for the purpose of defining the relative rights of the
holders  of  Senior  Indebtedness  on the  one  hand,  and  the  holders  of the
Subordinated  Obligations on the other hand, and, except as otherwise  expressly
provided herein,  none of such provisions shall impair, as between the Companies
and  the  holders  of  the  Subordinated  Obligations,  the  obligations  of the
Companies,  which are  unconditional  and absolute to pay to such holders all of
the Subordinated Obligations in accordance with the terms thereof.

                  3.5   Subrogation,   etc.  The  holders  of  the  Subordinated
Obligations  shall not be  subrogated to the rights of the holders of the Senior
Indebtedness in respect of payments or  distributions of assets of, or ownership
interests in, the  Companies  made on the Senior  Indebtedness,  if at all under
applicable law, until the Senior  Indebtedness shall have been indefeasibly paid
in full in cash and the Senior  Credit  Agreement  and the  Indenture  have been
terminated.

                  3.6 Permitted Payments of Subordinated Obligations.  Radio One
may,  from time to time,  pay or cause to be paid to any holder of  Subordinated
Obligations,  and any such  holder  may  accept and  retain,  payments  or other
distributions,  including  without  limitation  in respect of any  redemption or
other payment in respect of the Preferred  Stock,  to the extent,  and solely to
the extent,  permitted  (i) under the Senior  Credit  Agreement,  so long as any
Primary  Senior  Indebtedness  thereunder  remains  unpaid and the Senior Credit
Agreement has not been terminated,  and (ii) under the Indenture, so long as the
Senior Subordinated Notes, and all monetary obligations in connection therewith,
remain unpaid, and the Indenture has not been terminated.

         4.  Agreement  to  Hold  in  Trust.   If  any  holder  of  Subordinated
Obligations   shall  receive  any  payment  with  respect  to  the  Subordinated
Obligations in any form and from any source

                                        7



whatsoever  (including,  without  limitation,  any  payment or  distribution  of
collateral  security,  if any, or the  proceeds of any  collateral  security) in
violation of this Agreement,  it shall hold such payment in trust first, for the
benefit of the Senior  Lenders and,  promptly  upon  discovery or notice of such
violation,  pay it over to Agent  for the  benefit  of the  Senior  Lenders  for
application to payment of the Primary Senior  Indebtedness;  and upon receipt of
notice from the Agent that the Primary Senior Indebtedness has been paid in full
and the Senior Credit Agreement has been terminated,  shall  thereafter,  pay it
over to the Trustee for the benefit of the Senior  Subordinated  Noteholders for
application  in  payment  of the Senior  Subordinated  Notes and other  monetary
obligations under the Indenture.

         5.   Amendments   to   Subordinated   Agreements/Additional   Liens  on
Collateral.  Each Investor  covenants and agrees that, unless the Senior Lenders
otherwise consent thereto in writing,  it will not amend or modify any provision
of any of the (a) Warrant Agreement, (b) the Amended and Restated Certificate of
Incorporation of the Company, or the Preferred  Stockholders'  Agreement, or (c)
the other  Subordinated  Agreements,  in each such case, so as to effect (i) any
obligation  to pay any fees or any increase in the rate of interest or dividends
charged,  declared or accrued  thereunder,  (ii) any  increase in the  principal
amount or liquidation  value of the Subordinated  Obligations or any installment
due  thereunder,  or to create any  obligation  to make a  principal  payment or
payment in respect of redemption,  (iii) any additional payment or prepayment or
redemption  requirements,  or  requirements  in respect of  dividends  or voting
rights, (iv) any acceleration of the maturity date of any payment for principal,
redemptions,  dividends  or  interest,  (v)  amendment  of the form or method of
payment,  (vi) the granting or obtaining of any collateral security or obtaining
any  lien  on any  collateral,  (vii)  providing  for any  additional  covenants
(financial  or  otherwise) or events of default  (however  defined),  Redemption
Events or remedies,  or making more restrictive any existing covenants or events
of default or provisions  governing the Preferred Stock or Warrants,  (viii) any
rights to  control  the board of  directors  of any of the  Companies,  (ix) any
changes to Section 10 of the Preferred Stockholders' Agreement or Articles VI or
VIII of the Warrant Agreement or (x) any other amendment which would result in a
breach or  violation  of the  Senior  Credit  Agreement  or which  could have an
adverse  effect on the  operations of the  Companies,  the Agent's or the Senior
Lenders'  security  interest  in the  Collateral  or the  Agent's  or the Senior
Lenders'  Claims.  As used  herein,  the term  "Claims"  shall  mean the  Senior
Indebtedness and any and all now existing and future  indebtedness,  obligations
or liabilities,  including without limitation any post petition interest, of the
Companies  to Agent  and the  Senior  Lenders,  or the  Trustee  and the  Senior
Subordinated  Noteholders,  whether direct or indirect,  absolute or contingent,
secured or unsecured,  arising under the Senior Credit Agreement,  the Notes, or
any other Loan Documents,  or the Indenture or the Senior Subordinated Notes, or
the Subordinated Guaranties, as now written or as amended,  modified,  restated,
supplemented,  renewed, extended, increased, rearranged or substituted hereafter
or by operation of law or otherwise,  including any and all expenses  (including
reasonable  attorneys'  fees) incurred in connection  therewith and any interest
thereon.  Claims shall also  include all such Claims  arising as a result of any
refinancing of the Claims by another Person in accordance with the terms of this
Agreement or (c) obtain any liens on or security  interests in any of the assets
or Property of the  Companies as security for the  Subordinated  Obligations  or
otherwise.

                                        8



         6.  Requirement of Notice.  (a) The Investors agree to notify Agent and
the  Senior  Lenders  and the  Trustee,  on  behalf of the  Senior  Subordinated
Noteholders immediately upon the happening of any of the following:

                           (i) the Investors declare an event of default,  elect
         to exercise rights of any mandatory redemption or put in respect of the
         Preferred  Stock,  or elect to  exercise  any  rights  to  convert  the
         Preferred  Stock or Warrants into common stock or  indebtedness  of the
         Company or any Subsidiary, under any of the Subordinated Agreements;

                           (ii) the  waiver  by the  Investors  of any  material
         default or redemption event under any of the Subordinated Agreements;

                           (iii) the  acceleration  or  occurrence  of any event
         requiring  redemption of the Subordinated  Obligations,  or event which
         provides increased voting rights to the Investors,  or creates a Change
         of  Control  (as  defined  in  the  Senior  Credit   Agreement  or  the
         Indenture);

                           (iv) actual  knowledge of the  occurrence of a breach
         by the Company or any  Subsidiary  of any event under Section 10 of the
         Preferred  Stockholders  Agreement or under the Warrant Agreement which
         permits  the  Investors  to require  the  Company to seek a sale of the
         Company  or  its  assets,  or a  refinancing  of its  indebtedness  and
         obligations in respect of the Preferred Stock, in each case, subject to
         the terms hereof; or

                           (v) actual  knowledge  of any  breach by an  Investor
         under this  Agreement,  or any Loan  Document to which an Investor is a
         party executed in connection with the Senior Credit  Agreement,  or the
         Indenture.

                  (b)  Prior  to  the  commencement  of any  foreclosure  action
against a Company or  acceleration  of the Senior  Indebtedness  by reason of an
Event of Default under the Senior Credit  Agreement,  or acceleration  under the
Indenture,  each of the  Agent  and the  Trustee,  as the case may be,  agree to
notify the Investors of such Event of Default (although the failure to give such
notice  shall not  affect  the  validity  of such  acceleration  or  foreclosure
action).

         7.  Legend.  The  Companies  and  each  Investor,  for  itself  and its
successors and assigns as holders of Subordinated Obligations, covenant to cause
each agreement and instrument representing or evidencing any of the Subordinated
Obligations  issued or executed by the  Companies and either of them and held by
the Investors or any agreement securing the Subordinated  Obligations including,
without limitation,  the Preferred  Stockholders  Agreement,  the Warrants,  the
Warrant  Agreement,  the Preferred  Stock and any other documents or instruments
evidencing  Subordinated  Obligations or Liens or security interests in favor of
the Investor in connection with the Subordinated  Obligations from time to time,
if any, to have affixed upon it a legend which reads substantially as follows:

                                        9



         "This  instrument/agreement  is subject to a Standstill Agreement dated
         as of June 30, 1998 among RADIO ONE,  INC., the  Subsidiaries  of Radio
         One, Inc. from time to time,  the Investors (as defined  therein),  the
         Senior Lenders (as defined therein) and Credit Suisse First Boston,  as
         Agent to such Senior Lenders and  individually as a Senior Lender,  and
         United  States  Trust  Company of New York,  as Trustee  for the Senior
         Subordinated Noteholders (as defined therein).By its acceptance of this
         instrument/agreement,  the  holder  hereof  agrees  to be  bound by the
         provisions  of such  Standstill  Agreement to the same extent that each
         Investor is bound. In the event of any inconsistency  between the terms
         of  this   instrument/agreement   and  the  terms  of  such  Standstill
         Agreement,  the terms of the Standstill  Agreement  shall govern and be
         controlling."

         8.  Limit  on  Right of  Action.  Each  Investor,  for  itself  and its
successors  and  assigns,  agrees for the  benefit of the  holders of the Senior
Indebtedness  that  until  indefeasible  payment  in full in cash of the  Senior
Indebtedness  and termination of the Senior Credit  Agreement and the Indenture,
such  Investor  will not take any action to  accelerate  or demand  payment by a
Company of the Subordinated Obligations,  or exercise a right of redemption or a
put (to the Company) in respect of the Subordinated Obligations, or exercise any
of its  remedies in respect of the  Subordinated  Obligations,  to initiate  any
Reorganization  of,  or  litigation  against,  a  Company,  or to  foreclose  or
otherwise realize on any Lien, if any, given by a Company or any other Person to
secure the Subordinated Obligations;  provided,  however, that the Investors may
accelerate  or exercise a right of redemption  of the  Subordinated  Obligations
upon the earlier to occur of (i) a Reorganization  of the Company (provided that
the  Investors  agree  to  rescind  any  acceleration  or  notice  of  mandatory
redemption  resulting from a Reorganization  which is an involuntary  proceeding
dismissed or discharged  within 60 days thereof),  (ii) the  acceleration of the
Primary Senior Indebtedness by the holders thereof,  (iii) the date which is 180
days after the date the Investors  notify the Agent that one of the events under
subsections  (a),  (b) or  (c)  of  Section  10 of  the  Preferred  Stockholders
Agreement  has  occurred  so long as such  event  is  continuing  at the time of
acceleration  or exercise of the right of  redemption or a put (to the Company);
provided  further,  however,  after prior written notice to Agent, the Investors
may  also  initiate   litigation   against  the  Companies  and  the  Management
Stockholders  after  either  one of  the  events  set  forth  in  the  foregoing
subsections  (i) or (ii)  have  occurred.  Notwithstanding  the  foregoing,  the
Investors  may (x) sue for specific  performance  of any of the covenants in the
Subordinated  Agreements  pursuant to their  Rights  thereunder  so long as such
action is not in conflict with this Agreement,  does not involve an acceleration
or an exercise of the right of mandatory redemption or a put (to the Company) of
the  Subordinated  Obligations,  the  creation of any liens,  the payment of, or
determination  of, any  obligation  for money damages or the payment of any sums
whatsoever to the Investors, and (y) take the actions contemplated by Section 10
of the  Preferred  Stockholders  Agreement and Article VI or Article VIII of the
Warrant  Agreement  pursuant to their rights thereunder as in effect on the date
hereof;  provided,  however,  that at such time as the Agent  and/or  the Senior
Lenders have commenced to actively pursue the exercise of their Rights under the
Loan Documents to conduct a sale of the  Collateral  securing the Primary Senior
Indebtedness,  either  pursuant  to  the  exercise  of  foreclosure  Rights,  an
agreed-upon-sale,  or deed-in-lieu of foreclosure,  or otherwise, or the Trustee
on behalf of the Senior  Subordinated  Noteholders  has  commenced  to  actively
pursue the exercise of their Rights under the Senior  Subordinated  Notes or the
Indenture, then the Investors shall no

                                       10



longer  have the right to take any of the actions  permitted  to be taken by the
Investors  hereunder (other than  acceleration or exercise of a right to require
the Company to redeem any or all shares of Preferred  Stock under Section 8.1 of
the Preferred Stockholders Agreement, as applicable, the actions permitted under
Section 3.3 hereof,  or actions to perfect the Investors' rights to payment from
any excess proceeds arising from the Pledged Shares after payment in full of the
Senior  Indebtedness  and the termination of the Senior Credit Agreement and the
Indenture)  until such date as the Agent  and/or the Senior  Lenders  and/or the
Trustee on behalf of the Senior Subordinated  Noteholders cease such efforts. If
at any time the Agent,  the  Senior  Lenders  or the  Trustee,  on behalf of the
Senior  Subordinated  Noteholder  should begin or resume to actively  pursue the
exercise  of their  Rights  under the Loan  Documents  or the  Indenture  or the
Subordinated  Guaranties,  including  the  conducting  of a  sale  of any of the
Collateral by the Agent or any Senior  Lender,  then the  Investors  shall again
cease  taking any actions  permitted  hereunder.  In the event of a dispute with
respect to this provision,  it shall be the Investors'  burden of proof that the
Agent or the Senior Lenders or the Trustee on behalf of the Senior  Subordinated
Noteholders  have failed or ceased to actively pursue the exercise of the Rights
as described herein.

         9.       Intentionally Deleted.

         10.      Intentionally Deleted.

         11.  Additional  Rights of Senior  Lenders and the Senior  Subordinated
Noteholders.  If any Investor,  in violation of this Agreement,  shall commence,
prosecute or participate in any suit, action or proceeding  against a Management
Stockholder  or a Company,  a  Management  Stockholder  (relating  to the Senior
Indebtedness) or a Company may interpose as a defense or plea the making of this
Agreement, the Agent may intervene on behalf of the Senior Lenders and interpose
a defense or plea in the Agent's name and/or the Senior Lenders' names or in the
name of a Management  Stockholder or a Company, and the Trustee may intervene on
behalf of the Senior Subordinated Noteholders and interpose a defense or plea in
the Trustee's name and/or the Senior  Subordinated  Noteholders' names or in the
name of a Management  Stockholder or a Company. If any Investor shall attempt to
enforce any security agreement,  real estate mortgage, deed of trust or any lien
instrument or other encumbrance in violation of the terms of this Agreement, the
Agent  and/or the Senior  Lenders may by virtue of this  Agreement  restrain the
enforcement thereof in their name or in the name of the Management  Stockholders
or the Companies. If any Investor obtains any assets of a Company as a result of
any administrative,  legal or equitable action, or otherwise, each such Investor
agrees  forthwith to pay, deliver and assign to the Agent for the benefit of the
Senior Lenders any such assets for application to the Senior Indebtedness.

         12. Companies'  Additional  Agreement.  Each Company agrees with Agent,
the Senior Lenders, the Trustee and the Senior Subordinated  Noteholders that it
will not,  without the prior written  consent of Agent and the Senior  Lenders',
and the  Trustee on behalf of the Senior  Subordinated  Noteholders,  execute or
deliver any negotiable instrument as evidence of the Subordinated Obligations or
any part thereof, except as otherwise permitted by this Agreement.

                                       11



         13. Rights to Amend Loan Documents and Discontinue Senior Indebtedness.
Agent and the Senior Lenders hereby reserve the right, in their sole discretion,
to  modify,  amend,  waive or  release  any of the  terms of the  Senior  Credit
Agreement,  the Note,  or any of the other Loan  Documents,  and the  Trustee on
behalf of the Senior Subordinated  Noteholders hereby reserves the right, in its
sole  discretion,  to modify,  amend,  waive or release  any of the terms of the
Senior Subordinated Notes, or the Indenture or the Subordinated  Guaranties,  in
each case, at any time executed by the Management  Stockholders or the Companies
or any other Person in connection  with the Senior  Indebtedness or of any other
document  relative thereto and to exercise or refrain from exercising any powers
or rights which the Senior Lenders or the Senior  Subordinated  Noteholders  may
have thereunder, and such modification,  amendment, waiver, release, exercise or
failure to exercise  shall not affect any of Agent's,  the Senior  Lenders'  the
Trustee's or any Senior  Subordinated  Noteholder's rights under this Agreement.
Each Investor hereby agrees that Agent and the Senior Lenders,  and the Trustee,
on behalf of the  Senior  Subordinated  Noteholders,  may from time to time,  in
their sole discretion, amend the instrument and agreements evidencing the Senior
Indebtedness,  grant  extensions  of time of  payment  or  performance  and make
compromises and grant waivers or make settlements with the Companies and each of
them or other  creditors of the Companies,  without  affecting the agreements of
the Investors, the Management Stockholders or the Companies hereunder. If at any
time  hereafter,  Agent and the Senior  Lenders  shall,  in their own  judgment,
determine to discontinue  the extension of credit to the Companies,  they may do
so. This  Agreement  shall  continue  in full force and effect  until the Senior
Indebtedness  shall have been  indefeasibly  paid in full in cash and the Senior
Credit  Agreement and the Indenture have been  terminated.  Notwithstanding  the
foregoing,  Agent and the Senior Lenders agree that they shall not,  without the
prior  consent of  Investors  holding a majority in  interest  of the  Preferred
Stock,  modify the Loan Documents (a) to increase the rates of interest  payable
thereunder  above the default rate of interest  prescribed by Section  4.1(c) of
the Senior  Credit  Agreement;  provided  that this clause shall not restrict or
prohibit the Agent or the Senior  Lenders from charging fees in connection  with
the Loan Documents,  amendments or waivers relating thereto and/or in connection
with any  over-advance  facility  that may be extended  from time to time in the
Senior Lenders'  discretion,  (b) amend or modify the Senior Credit Agreement so
as to further restrict Radio One's ability to make interest or dividend payments
on the  Subordinated  Obligations,  (c) to increase the Senior  Indebtedness  in
violation  of  Section  1.2  hereof or (d)  extend  the  maturity  date past the
maturity date of the Subordinated Obligations.

         14.  Compensation and Indemnity.  Radio One shall reimburse the Trustee
promptly upon request for all reasonable out-of-pocket expenses incurred or made
by it, in  connection  with this  Agreement.  Such  expenses  shall  include the
reasonable  compensation  and  expenses,   disbursements  and  advances  of  the
Trustee's agents,  counsel,  accountants and experts.  Radio One shall indemnify
the Trustee against any and all loss, liability or expense (including attorneys'
fees) incurred by it in connection with the performance of its duties hereunder,
including  the costs and  expenses  of  defending  itself  against  any claim or
liability in connection with the  acceptance,  exercise or performance of any of
its powers or duties hereunder or under the NB Standstill Agreement. The Trustee
shall notify  Radio One  promptly of any claim for which it may seek  indemnity.
Failure by the Trustee so to notify Radio One shall not relieve Radio One of its
obligations hereunder. Radio One shall defend the claim and the Trustee may have
separate

                                       12



counsel and Radio One shall pay the fees and expenses of such counsel. Radio One
need not  reimburse  any expense or  indemnify  against any loss,  liability  or
expense  incurred by the Trustee  through the Trustee's  own wilful  misconduct,
negligence or bad faith.

         15.  Further  Assurances.  Each  Company,  Management  Stockholder  and
Investor,  for itself and its successors and assigns as holders of  Subordinated
Obligations,  covenant to execute and deliver to Agent,  the Senior  Lenders and
the Trustee for the benefit of the Senior Subordinated  Noteholders such further
instruments  and documents and take such further  actions as Agent, on behalf of
the  Senior  Lenders  and the  Trustee,  on  behalf of the  Senior  Subordinated
Noteholders  may from time to time  reasonably  request.  Without  limiting  the
foregoing, in the event that all or part of the Senior Indebtedness is hereafter
refinanced,  refunded  or  replaced  through  the  Senior  Lenders,  the  Senior
Subordinated  Noteholders  and/or any other  lender(s) in  accordance  with this
Agreement, the Investors agree to enter into one or more new agreements with the
Senior Lenders, the Senior Subordinated Noteholders and/or such lender providing
for the  subordination  of the  Subordinated  Obligations  to at least  the same
extent, and upon substantially similar terms, as provided in this Agreement.

         16. Notices.  All notices,  requests,  demands and other communications
hereunder shall be in writing and shall be delivered by hand, telecopy or by any
form of delivery  (including  but not  limited to United  States  Registered  or
Certified Mail or Federal Express or other overnight delivery service) requiring
or providing  for a signed  receipt,  and  addressed as set forth on Schedule 16
hereto,  or to such other address or addresses as the party to whom such notices
directed may have  designated  in writing to the other parties  hereto.  Notices
shall be deemed  given upon the  earlier  to occur of (i)  actual  receipt by or
delivery to the addressee,  or (ii) the third day following deposit thereof with
the U.S. Postal Service for delivery via certified or registered  mail,  postage
prepaid.

         17. Successors; Continuing Effect, Etc. This Agreement is being entered
into  for  the  benefit  of the  holders  of the  Senior  Indebtedness  and  the
Subordinated  Obligations,  and their  respective  successors and assigns.  This
Agreement  shall be a continuing  agreement and shall be  irrevocable  and shall
remain in full  force and effect so long as there are both  Senior  Indebtedness
and  Subordinated  Obligations  outstanding  or committed  to be  advanced.  The
liability of the Investors  hereunder  shall be reinstated and revived,  and the
rights of the holders of the Senior Indebtedness shall continue, with respect to
any amount at any time paid on account of the Senior  Indebtedness  which  shall
thereafter  be  required to be restored or returned by the holders of the Senior
Indebtedness in any Reorganization (including without limitation,  any repayment
made  pursuant to any  provision of Chapter 5 of Title 11,  United States Code),
all as though such amount had not been paid.

         18. Entire Agreement;  Amendment. This Agreement constitutes the entire
agreement  of the parties  with  respect to the subject  matter  hereof,  and no
modification  or waiver of any provision of this Agreement shall in any event be
effective  unless the same shall be in writing signed by Agent, on behalf of the
Senior Lenders,  the Trustee, on behalf of the Senior Subordinated  Noteholders,
and the  Investors  (unless  such  amendment  or  modification  shall impose any
additional

                                       13



obligations  upon the Companies,  in which case such  amendment or  modification
shall also require execution by the Companies).

         19.      Applicable Law; Jurisdiction and Venue; Waiver of Jury Trial.

                  (a)  APPLICABLE   LAW.  THIS  AGREEMENT  AND  THE  RIGHTS  AND
OBLIGATIONS  OF THE PARTIES  HEREUNDER  SHALL BE GOVERNED BY, AND  CONSTRUED AND
INTERPRETED IN ACCORDANCE WITH, THE LAW OF THE STATE OF NEW YORK.

                  (b)  JURISDICTION  AND VENUE.  Each of the  Companies and each
Investor hereby irrevocably and unconditionally:

                           (i) submits for itself and its  property in any legal
         action or proceeding relating to this Agreement, or for recognition and
         enforcement of any judgement in respect thereof,  to the  non-exclusive
         general jurisdiction of the Courts of the State of New York, the courts
         of the United States of America for the Southern  District of New York,
         and appellate courts from any thereof;

                           (ii) consents that any such action or proceeding  may
         be brought in such courts and waives any  objection  that it may now or
         hereafter  have to the venue of any such  action or  proceeding  in any
         such  court  or that  such  action  or  proceeding  was  brought  in an
         inconvenient court and agrees not to plead or claim the same;

                           (iii)  designates  and appoints  Corporation  Service
         Company,  with offices at 375 Hudson Street,  New York, New York 10014,
         as agent to receive for and on behalf of each of the  Companies and the
         Investors service of process in New York. In the event that Corporation
         Service  Company resigns or ceases to serve as the agent for service of
         process  hereunder,  the  Company  agrees  forthwith  (A) to  designate
         another  agent for  service of process in the State of New York and (B)
         to give prompt  written  notice to the Agent of the name and address of
         such agent. In addition,  each of the Companies and the Investors agree
         that  service of process in any such action or  proceeding  may also be
         effected by mailing a copy thereof by registered or certified  mail (or
         any substantially  similar form of mail), postage prepaid, to it at its
         address set forth in Schedule 16;

                           (iv)  agrees that  nothing  herein  shall  affect the
         right to effect service of process in any other manner permitted by law
         or shall limit the right to sue in any other jurisdiction; and

                           (v) waives,  to the maximum  extent not prohibited by
         law,  any right it may have to claim or recover in any legal  action or
         proceeding  referred to in this Section  19(b) any special,  exemplary,
         punitive or consequential damages.

                                       14



         (c)  WAIVER  OF RIGHT TO JURY  TRIAL.  EACH OF THE  AGENT,  THE  SENIOR
LENDERS,  THE  TRUSTEE ON BEHALF OF THE  SENIOR  SUBORDINATED  NOTEHOLDERS,  THE
COMPANIES AND EACH INVESTOR,  FOR THEMSELVES AND THEIR RESPECTIVE SUCCESSORS AND
ASSIGNS,  HEREBY WAIVES TO THE FULLEST EXTENT PERMITTED BY LAW, THEIR RESPECTIVE
RIGHTS TO A JURY TRIAL OF ANY CLAIM OR CAUSE OF ACTION BASED UPON OR ARISING OUT
OF THIS AGREEMENT.  The scope of this waiver is intended to be all  encompassing
of any and all  disputes  that may be filed in any court and that  relate to the
subject matter of this  transaction,  including,  without  limitation,  contract
claims,  tort  claims,  breach  of duty  claims,  and all other  common  Law and
statutory  claims.  The  Companies  acknowledge  that this  waiver is a material
inducement  to  the  Senior   Lenders'   agreement  to  enter  into  a  business
relationship,  that the Senior  Lenders  have  already  relied on this waiver in
entering  into the Senior  Credit  Agreement,  and that the Senior  Lenders will
continue  to rely on this  waiver in  related  future  dealings.  The  Companies
further  warrant and represent that they have knowingly and  voluntarily  waived
their jury trial rights following  consultation with legal counsel.  THIS WAIVER
IS IRREVOCABLE, MEANING THAT IT MAY NOT BE MODIFIED EITHER ORALLY OR IN WRITING,
AND  THIS  WAIVER  SHALL  APPLY  TO ANY  SUBSEQUENT  AMENDMENTS,  MODIFICATIONS,
RENEWALS, EXTENSIONS, RESTATEMENTS, REARRANGEMENTS, SUPPLEMENTS OR SUBSTITUTIONS
TO THIS AGREEMENT. In the event of litigation,  this Agreement may be filed as a
written consent to a trial by the court.

         20.  Miscellaneous.  This  Agreement  may be  signed  in any  number of
counterparts  which,  when taken  together,  shall  constitute  one and the same
document.  The headings in this Agreement are for  convenience of reference only
and shall not alter or otherwise affect the meaning hereof.  In the event of any
conflict  between the  provisions of the Agreement and the  provisions of any of
the  Loan  Documents,   the  Senior  Subordinated  Notes,  the  Indenture,   the
Subordinated Guaranties,  or any of the Subordinated Agreements,  the provisions
of this Agreement  shall control.  The Companies  shall reimburse the holders of
the Senior  Indebtedness  upon  demand  for all  reasonable  costs and  expenses
(including reasonable attorney's fees and disbursements) paid or incurred by the
holders of the Senior  Indebtedness  in connection  with any enforcement of this
Agreement in favor of the holders of the Senior Indebtedness.

         21.  Final  Agreement.  THIS  WRITTEN  AGREEMENT  REPRESENTS  THE FINAL
AGREEMENT  BETWEEN THE PARTIES AND MAY NOT BE CONTRADICTED BY EVIDENCE OF PRIOR,
CONTEMPORANEOUS,  OR SUBSEQUENT  ORAL  AGREEMENTS  OF THE PARTIES.  THERE ARE NO
UNWRITTEN ORAL AGREEMENTS BETWEEN THE PARTIES.

         22. No Personal Liability of Management  Stockholders.  Notwithstanding
anything herein to the contrary, neither Jerry A. Moore, III, Alfred C. Liggins,
nor Catherine L. Hughes shall have personal liability under this Agreement.

                                       15



                                   APPENDIX A

"Affiliate"  means,  with  respect to any  specified  Person,  any other  Person
directly or indirectly  controlling or controlled by or under direct or indirect
common  control with such  specified  Person.  For purposes of this  definition,
"control of" (including,  with correlative  meanings,  the terms  "controlling,"
"controlled   by"  and  "under  common  control  with")  any  Person  means  the
possession,  directly  or  indirectly,  of the  power to  direct  or  cause  the
direction  of the  management  or policies of such Person,  whether  through the
ownership  of voting  securities,  by  agreement  or  otherwise;  provided  that
beneficial  ownership of 10% or more of the voting  securities of a Person shall
be deemed to be control.

"Agent"  shall  mean CSFB and any  successor  to CSFB  under the  Senior  Credit
Agreement or any other person or entity  acting  either on its own (in the event
there is only one Senior Lender) of on behalf of a group of Senior Lenders under
the Senior Credit Agreement.

"Collateral" has the meaning set forth in the Senior Credit Agreement.

"Equity Interest" of any Person means any and all shares,  interests,  rights to
purchase, warrants, options, participations or other equivalents of or interests
in (however  designated)  equity of such Person,  including any preferred stock,
but excluding any debt securities  convertible into such equity,  and including,
in the case of a partnership, partnership interests (whether general or limited)
and any other  interest or  participation  that confers on a Person the right to
receive a share of the  profits  and losses of, or  distributions  of assets of,
such partnership.

"Event of Default" means any of the events  specified in Section 9 of the Senior
Credit  Agreement,  provided that any requirement for the giving of notice,  the
lapse of time, or both, has been satisfied.

"Guaranty" means (i) those certain  Guaranties,  dated as of June 30, 1998, from
each of Radio One  Licenses,  Inc., a Delaware  corporation,  Bell  Broadcasting
Company,  a Michigan  corporation,  and Radio One of Detroit,  Inc.,  a Delaware
corporation  and (ii) each  Guaranty of a  Restricted  Subsidiary,  executed and
delivered as required pursuant to the terms of the Senior Credit  Agreement,  as
the same may be amended, modified,  restated,  supplemented,  renewed, extended,
rearranged or substituted from time to time.

"Lien"  means  any  mortgage,   pledge,   hypothecation,   assignment,   deposit
arrangement,  encumbrance,  lien (statutory or other),  charge or other security
interest or any preference, priority or other security agreement or preferential
arrangement of any kind or nature whatsoever (including, without limitation, any
conditional sale or other title retention agreement and any capital lease having
substantially the same economic effect as any of the foregoing).

"Liquidation  Value" has the meaning  specified for such term in the Amended and
Restated Certificate of Incorporation of Radio One in effect on the date hereof.




"Loan  Documents"  means this Agreement,  the Senior Credit  Agreement,  all UCC
financing statements,  the Notes, the Security Documents,  any Application,  any
Interest Hedge  Agreements  with any Senior Lenders  relating to the Loans , the
Fee Letters, all certificates executed and delivered in connection with any Loan
Document,  any  agreements  between  any of the  Companies  and the Agent or any
Senior Lender in respect of fees or the  reimbursement of costs and expenses and
any and all other  documents,  instruments,  certificates  and agreements now or
hereafter  executed or delivered by any Person pursuant to or in connection with
any  of  the  foregoing,   and  any  and  all  present  or  future   amendments,
modifications,   supplements,  renewals,  extensions,  increases,  restatements,
rearrangements  or substitutions  from time to time of all or any part of any of
the foregoing.  Capitalized  terms used herein that are not defined elsewhere in
this Agreement shall have the meanings set forth in the Senior Credit Agreement.

"Notes" has the meaning set forth in the Senior Credit Agreement.

"Obligations" means the unpaid principal of and interest on (including,  without
limitation,  interest accruing after the maturity of the Loans and Reimbursement
Obligations  and  interest   accruing  after  the  filing  of  any  petition  in
bankruptcy,  or the  commencement  of any  insolvency,  reorganization  or  like
proceeding,  relating  to any of  the  Companies,  whether  or not a  claim  for
post-filing or  post-petition  interest is allowed in such proceeding) the Loans
and  Reimbursement  Obligations and all other obligations and liabilities of any
of the  Companies  to the Agent or to any Senior  Lender (or, in the case of any
Interest Rate Protection Agreement, any Affiliate of any Senior Lender), whether
direct  or  indirect,  absolute  or  contingent,  due or to become  due,  or now
existing or hereafter incurred,  which may arise under, out of, or in connection
with,  the Senior  Credit  Agreement,  any other Loan  Document,  the Letters of
Credit,  any Interest  Rate  Protection  Agreement  entered into with any Senior
Lender (or any  Affiliate  of any Senior  Lender)  or any other  document  made,
delivered or given in connection  herewith or  therewith,  whether on account of
principal,  interest,   reimbursement  obligations,  fees,  indemnities,  costs,
expenses  (including,  without  limitation,  all  reasonable  fees,  charges and
disbursements  of counsel to the Agent or to any Senior Lender that are required
to be paid by any of the Companies  pursuant to the Senior Credit  Agreement) or
otherwise.  Capitalized terms used herein that are not defined elsewhere in this
Agreement shall have the meanings set forth in the Senior Credit Agreement.

"Person"  means  an  individual,  partnership,  corporation,  limited  liability
company, business trust, joint stock company, trust, unincorporated association,
joint venture, governmental authority or other entity of whatever nature.

"Pledged Shares" means the shares of capital stock pledged to the Agent pursuant
to the  Pledge  Agreements  (as  such  term  is  defined  in the  Senior  Credit
Agreement).

"Preferred  Stock"  means the Series A Senior  Cumulative  Redeemable  Preferred
Stock and the Series B Senior  Cumulative  Redeemable  Preferred  stock of Radio

One.

"Preferred  Stockholders' Agreement" means the Preferred Stockholders' Agreement
by and among the Investors named therein, Radio One, Radio One Licenses, Inc., a
Delaware corporation, and the




Management  Stockholders,  as  amended  by  the  First  Amendment  to  Preferred
Stockholders'  Agreement of even date herewith, and as may be hereafter modified
or amended.

"Redemption  Events" has the meaning  set forth in the  Preferred  Stockholders'
Agreement.

"Rights" means rights, remedies, powers and privileges.

"Security Documents" means the Security Agreements,  the Pledge Agreements,  the
Intellectual Property Security Agreements,  the Mortgages, each Guaranty and any
and all other agreements, deeds of trust, mortgages, chattel mortgages, security
agreements, pledges, guaranties, assignments of proceeds, assignments of income,
assignments of contract rights, assignments of partnership interest, assignments
of  royalty   interests,   assignments  of   performance  or  other   collateral
assignments,  completion  or surety  bonds,  standby  agreements,  subordination
agreements,  undertakings  and  other  documents,  agreements,  instruments  and
financing  statements  now or  hereafter  executed or delivered by any Person in
connection  with,  or as  security  for  the  payment  or  performance  of,  the
Obligations  or any part  thereof.  Capitalized  terms used  herein that are not
defined  elsewhere  in this  Agreement  shall have the meanings set forth in the
Senior Credit Agreement.

"Securities  Purchase Agreement" means the Securities Purchase Agreement,  dated
June 6, 1997, by and among Radio One, the  Investors,  certain  Subsidiaries  of
Radio One then existing and the Management Stockholders.

"Senior Lenders" means CSFB and NationsBank, N.A. and any other lender under the
Senior Credit Agreement and their respective successors and assigns.

"Subsidiary" means, with respect to any Person, any corporation,  association or
other  business  entity of which more than 50% of the total  voting power of all
Voting  Equity  Interests  entitled  (without  regard to the  occurrence  of any
contingency) to vote in the election of directors, managers or trustees or other
governing  body  thereof  is at the time  owned  or  controlled  by such  Person
(regardless  of whether such Equity  Interests are owned directly or through one
or more other  Subsidiaries  of such Person or a  combination  thereof).  Unless
otherwise  qualified,  all references to a "Subsidiary" or to  "Subsidiaries" in
this Agreement shall refer to a Subsidiary or Subsidiaries of Radio One.

"Warrant  Agreement" means the  Warrantholders'  Agreement,  dated as of June 6,
1995, by and among the Investors named therein,  Radio One, the  subsidiaries of
Radio One then  existing,  and the  Management  Stockholders,  as amended by the
First Amendment to the Warrantholders'  Stockholders' Agreement, dated as of May
19, 1997, and as may be hereafter modified or amended.

"Warrants"  means the Warrants for Common Stock of Radio One issued  pursuant to
the Warrant Agreement.




                                    EXHIBIT A

I.       Series A Preferred Stock

          Investor                          Liquidation Value of Preferred Stock
- --------------------------------------------------------------------------------
Alliance Enterprise Corporation                                      $912,655.00
- --------------------------------------------------------------------------------
Alfred C. Liggins                                                    $235,967.00
- --------------------------------------------------------------------------------
Opportunity Capital Corporation                                      $487,230.00
- -------------------------------------------------------------------------------
Capital Dimensions Venture Fund, Inc.                              $3,725,814.00
- --------------------------------------------------------------------------------
Fulcrum Venture Capital Corporation                                  $965,009.00
- --------------------------------------------------------------------------------
TSG Ventures L.P.                                                    $798,059.00
- --------------------------------------------------------------------------------
Syncom Capital Corporation                                         $1,359,569.00
- --------------------------------------------------------------------------------


II.      Series B Preferred Stock

          Investor                          Liquidation Value of Preferred Stock
- --------------------------------------------------------------------------------
ALTA Subordinated Debt Partners III, L.P.                          $7,213,957.00
- --------------------------------------------------------------------------------
BancBoston Investments, Inc.                                       $4,924,944.00
- --------------------------------------------------------------------------------
Grant M. Wilson                                                      $307,809.00
- --------------------------------------------------------------------------------





III.     Warrantholders

           Name of Holder                                Number of Warrants Held
- --------------------------------------------------------------------------------
Capital Dimensions Venture Fund              Warrants to acquire 15.24 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Fulcrum Venture Capital Corporation          Warrants to acquire 15.61 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Syncom Capital Corporation                   Warrants to acquire 36.12 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Alfred C. Liggins                            Warrants to acquire 0.97 shares of 
                                             Class A Common Stock
- --------------------------------------------------------------------------------
TSG Ventures L.P.                            Warrants to acquire 3.27 shares of 
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Alliance Enterprise Corporation              Warrants to acquire 18.70 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Opportunity Capital Corporation              Warrants to acquire 6.20 shares  of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
ALTA Subordinated Debt Partners III, L.P.    Warrants to acquire 29.52 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
BancBoston Investments Inc.                  Warrants to acquire 20.15 shares of
                                             Class A Common Stock
- --------------------------------------------------------------------------------
Grant M. Wilson                              Warrants to acquire 1.26 shares  of
                                             Common Stock
- --------------------------------------------------------------------------------



                                   SCHEDULE 16

Notice Addresses
- ----------------
         if to the Companies, to the following address:

                  c/o  Radio One, Inc.
                  5900 Princess Garden Parkway
                  Lanham, Maryland  20706
                  Attention:  Mr. Alfred C. Liggins, President

         if to the Senior Lenders, to the following address:

                  Credit Suisse First Boston
                  Eleven Madison Avenue
                  New York, New York  10010
                  Attention:  Agency Administration

                  and to:

                  Baker & Botts, L.L.P.
                  2001 Ross Avenue
                  800 Trammell Crow Center
                  Dallas, Texas  75201
                  Attention:  Alison C. Courtwright, Esq.

         If to the Senior Subordinated Noteholders, to the following address:

                  United States Trust Company of New York
                  114 West 47th Street
                  New York, New York 10036
                  Attention: Corporate Trust Division

         and to:

                  Willkie Farr & Gallagher
                  One Citicorp Center
                  153 East 53rd Street
                  New York, New York 10022
                  Attention: Jeffrey R. Poss, Esq.




         if to the Investors, to the following addresses:

                  Alta Subordinated Debt Partners III, L.P.
                  c/o  Alta Subordinated Debt Management III, L.P.
                  Attention:  Brian W. McNeill

                  Burr, Egan, Deleage & Co.
                  One Post Office Square
                  Boston, Massachusetts  02109

                  BancBoston Investments, Inc.
                  Attention:  Sanford Anstey
                  100 Federal Street, 32nd Floor
                  Boston, Massachusetts  02110

                  Grant M. Wilson
                  201 Concord Street

                  Carlisle, Massachusetts  01741

                  Syncom Capital Corporation
                  Attention:  Terry L. Jones, President
                  8401 Colesville Road
                  Suite 300
                  Silver Spring, Maryland  20910

                  Alliance Enterprise Corporation
                  Attention:  Tom Gerron
                  12655 North Central Expressway
                  Dallas, Texas  75243

                  Opportunity Capital Corporation
                  Attention:  J. Peter Thompson, President
                  2201 Walnut Avenue, Suite 210
                  Freemont, California  94538

                  Capital Dimensions Venture Fund, Inc.
                  Attention:  Dean Pickerell, President
                  Two Applegate Square
                  Suite 335-T
                  Minneapolis, Minnesota  55425-1637

                  TSG Ventures LP
                  TSGVI Associates, Inc.
                  177 Broad Street - 12th Floor
                  Stamford, CT  06901




                  Fulcrum Venture Capital Corporation
                  Attention:  Brian E. Argrette
                  300 Corporate Point, Suite 380
                  Culver City, California  90230

                  Alfred C. Liggins
                  c/o  Radio One, Inc.
                  5900 Princess Garden Parkway
                  Lanham, Maryland  20706

L



         IN WITNESS  WHEREOF,  the  undersigned  have executed  this  Standstill
Agreement as a sealed instrument as of the day and year first above written.

                                    CREDIT SUISSE FIRST BOSTON, as Agent

                                    By:
                                       -----------------------------------------
                                      Name:
                                      Title:

                                   UNITED STATES TRUST COMPANY
                                   OF NEW YORK, as Trustee

                                    By:
                                       -----------------------------------------
                                      Name:
                                      Title:

                                    RADIO ONE, INC.

                                    By:
                                       -----------------------------------------
                                       Name:     Alfred C. Liggins
                                       Title:    President

                                    RADIO ONE LICENSES, INC.

                                    By:
                                       -----------------------------------------
                                       Name:     Alfred C. Liggins
                                       Title:    President

                                    BELL BROADCASTING, INC.

                                    By:
                                       -----------------------------------------
                                       Name:     Alfred C. Liggins
                                       Title:    President

                                    RADIO ONE OF DETROIT, INC.

                                    By:
                                       -----------------------------------------
                                    Name:     Alfred C. Liggins
                                    Title:    President

                    [Signature Page to Standstill Agreement]



                                   INVESTORS:

                                   ALTA SUBORDINATED DEBT
                                   PARTNERS III, L.P.

                                   By:    Alta Subordinated Debt
                                          Management III, L.P., its
                                          General Partner

                                    By:
                                       -----------------------------------------
                                      Name:
                                      Title:

                                    BANCBOSTON INVESTMENTS INC.

                                    By:
                                       -----------------------------------------
                                       Name:  Lars A. Swanson
                                       Title:  Vice President

                                   
                                    --------------------------------------------
                                    Grant M. Wilson, individually

                                    SYNCOM CAPITAL CORPORATION

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                                    ALLIANCE ENTERPRISE CORPORATION

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                    [Signature Page to Standstill Agreement]



                                    OPPORTUNITY CAPITAL CORPORATION

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                                    CAPITAL DIMENSIONS VENTURE
                                    FUND, INC.

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                                    TSG VENTURES L.P.

                                    By:    TSGVI Associates, Inc.
                                           its general partner

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                                    FULCRUM VENTURE CAPITAL
                                    CORPORATION

                                    By:
                                       -----------------------------------------
                                       Name:
                                       Title:

                                    --------------------------------------------
                                    Alfred C. Liggins, individually

                    [Signature Page to Standstill Agreement]



                                     MANAGEMENT STOCKHOLDERS:
     
                                     -------------------------------------------
                                     Alfred C. Liggins, individually

                                     -------------------------------------------
                                     Catherine L. Hughes, individually

                                     -------------------------------------------
                                     Jerry A. Moore III, individually

                    [Signature Page to Standstill Agreement]