Exhibit 4.2

UNLESS THIS SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OUNLESS THIS
SECURITY IS PRESENTED BY AN AUTHORIZED REPRESENTATIVE OF THE DEPOSITORY TRUST
COMPANY TO THE COMPANY OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR
PAYMENT, AND ANY SECURITY ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN
SUCH OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY (AND ANY PAYMENT HEREON IS MADE TO CEDE & CO. OR TO
SUCH OTHER ENTITY AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF THE
DEPOSITORY TRUST COMPANY), ANY TRANSFER, PLEDGE OR OTHER USE HEREOF FOR VALUE OR
OTHERWISE BY OR TO ANY PERSON IS WRONGFUL SINCE THE REGISTERED OWNER HEREOF,
CEDE & CO., HAS AN INTEREST HEREIN.

TRANSFERS OF THIS SECURITY SHALL BE LIMITED TO TRANSFERS IN WHOLE, BUT NOT IN
PART, TO NOMINEES OF CEDE & CO. OR TO A SUCCESSOR THEREOF OR SUCH SUCCESSOR'S
NOMINEE.

                                CSX CORPORATION



                                  $
                              6.75% NOTES DUE 2011

No.                                                        CUSIP No.

     This security (the "Security") is one of a duly authorized issue of
securities (herein called the "Securities") of CSX Corporation, a Virginia
corporation (hereinafter called the "Company," which term includes any successor
corporation under the Indenture hereinafter referred to), issued and to be
issued in one or more series under an indenture, unlimited as to aggregate
principal amount, dated as of August 1, 1990 between the Company and The Chase
Manhattan Bank, Trustee (herein called the "Trustee," which term includes any
successor trustee under the Indenture (as hereinafter defined)), as supplemented
by a First Supplemental Indenture dated as of June 15, 1991, a Second
Supplemental Indenture dated as of May 6, 1997 and a Third Supplemental
Indenture dated as of April 22, 1998, to which indenture and all indentures
supplemental thereto (the indenture, as supplemented being herein called the
"Indenture") reference is hereby made for a statement of the respective rights
thereunder of the Company, the Trustee and the Holders of the Securities and of
the terms upon which the Securities are, and are to be, authenticated and
delivered. This Security is one of the series designated on the face hereof,
which series has been issued in an initial aggregate principal amount of
$500,000,000 (FIVE HUNDRED MILLION DOLLARS). All Securities of this series need
not be issued at the same time and such series may be reopened at any time,
without the consent of any Holder, for issuances of additional Securities of
this series. Any such additional Securities of this series will have the same
interest rate, maturity and other terms as those initially issued. Further
Securities of this series may also be authenticated and delivered as provided by
Sections 304,305, 306 or 906 of the Indenture. This Security represents an
aggregate initial principal amount of $______________ (______________________)
(as adjusted from time to time in accordance with the terms and provisions
hereof and as set forth on Exhibit A hereto, the "Principal Amount") of the
Securities of such series, with the Interest Payment Dates, date of original
issuance, and date of Maturity specified herein and bearing interest on said
Principal Amount at the interest rate specified herein.



     The Company, for value received, hereby promises to pay CEDE & CO., or its
registered assigns, the principal sum of $400,000,000 (FOUR HUNDRED MILLION
DOLLARS) on March 15, 2011 and to pay interest (computed on the basis of a 360-
day year of twelve 30-day months) thereon from March 13, 2001 or from the most
recent Interest Payment Date to which interest has been paid or duly provided
for, or, if the date of this Security is an Interest Payment Date to which
interest has been paid or duly provided for, then from the date hereof,
semiannually in arrears on March 15 and September 15 of each year, commencing
September 15, 2001, and at Maturity at the rate of 6.75% per annum, until the
principal hereof is paid or duly made available for payment.  The Company shall
pay interest on overdue principal and premium, if any, and (to the extent
lawful) interest on overdue installments of interest at the rate per annum borne
by the Security.  The interest so payable, and punctually paid or duly provided
for, on any Interest Payment Date will, as provided in such Indenture, be paid
to the Person in whose name this Security (or one or more Predecessor
Securities) is registered at the close of business on the Regular Record Date
for such interest, which shall be the March 1 or September 1 (whether or not a
Business Day), as the case may be, next preceding such Interest Payment Date.
Except as otherwise provided in the Indenture, any such interest not so
punctually paid or duly provided for shall forthwith cease to be payable to the
Holder on such Regular Record Date and may be paid to the Person in whose name
this Security (or one or more Predecessor Securities) is registered at the close
of business on a Special Record Date to be fixed by the Trustee for the payment
of such Defaulted Interest, notice whereof shall be given to the Holder of this
Security not less than 10 days prior to such Special Record Date, or may be paid
at any time in any other lawful manner not inconsistent with the requirements of
any securities exchange on which the Securities of this series may be listed,
and upon such notice as may be required by such exchange, all as more fully
provided in such Indenture.  Notwithstanding the foregoing, interest payable on
this Security at Maturity will be payable to the person to whom principal is
payable.

     This Security is exchangeable in whole or from time to time in part for
definitive Registered Securities of this series only as provided in this
paragraph.  If (x) the Depository with respect to the Securities of this series
(the "Depository") notifies the Company that it is unwilling, unable or
ineligible to continue as Depository for this Security or if at any time the
Depository ceases to be a clearing agency registered under the Securities
Exchange Act of 1934, as amended, and a successor Depository is not appointed by
the Company within 90 days, (y) the Company in its sole discretion determines
that this Security shall be exchangeable for definitive Registered Securities
and executes and delivers to the Trustee a Company Order providing that this
Security shall be so exchangeable or (z) there shall have happened and be
continuing an Event of Default or any event which, after notice or lapse of
time, or both, would become an Event of Default with respect to the Securities
of the series of which this Security is a part, this Security or any portion
hereof shall, in the case of clause (x) above, be exchanged for definitive
Registered Securities of this series, and in the case of clauses (y) and (z)
above, be exchangeable for definitive Registered Securities of this series,
provided that the definitive Security so issued in exchange for this Security
shall be in authorized denominations and be of like tenor and of an equal
aggregate principal amount as the portion of the Security to be exchanged, and
provided further that, in the case of clauses (y) and (z) above, definitive
Registered Securities of this series will be issued in exchange for this
Security, or any portion hereof, only if such definitive Registered Securities
were requested by written notice to the Security Registrar by or on behalf of a
Person who is a beneficial owner of an interest herein given through the Holder
hereof. Any definitive Registered Security of this series issued in exchange for
this Security, or any portion hereof, shall be registered in the name or names
of
                                       2


such Person or Persons as the Holder hereof shall instruct the Security
Registrar. Except as provided above, owners of beneficial interests in this
Security will not be entitled to receive physical delivery of Securities in
definitive form and will not be considered the Holders thereof for any purpose
under the Indenture.

     Any exchange of this Security or portion hereof for one or more definitive
Registered Securities of this series will be made at the New York office of the
Security Registrar.  Upon exchange of any portion of this Security for one or
more definitive Registered Securities of this series, the Trustee shall endorse
Exhibit A of this Security to reflect the reduction of its Principal Amount by
an amount equal to the aggregate principal amount of the definitive Registered
Securities of this series so issued in exchange, whereupon the Principal Amount
hereof shall be reduced for all purposes by the amount so exchanged and noted.
Except as otherwise provided herein or in the Indenture, until exchanged in full
for one or more definitive Registered Securities of this series, this Security
shall in all respects be subject to and entitled to the same benefits and
conditions under the Indenture as a duly authenticated and delivered definitive
Registered Security of this series.

     The principal and any interest in respect of any portion of this Security
payable in respect of an Interest Payment Date or at the Stated Maturity
thereof, in each case occurring prior to the exchange of such portion for a
definitive Registered Security or Securities of this series, will be paid, as
provided herein, to the Holder hereof which will undertake in such circumstances
to credit any such principal and interest received by it in respect of this
Security to the respective accounts of the Persons who are the beneficial owners
of such interests on such Interest Payment Date or at Stated Maturity.  If a
definitive Registered Security or Registered Securities of this series are
issued in exchange for any portion of this Security after the close of business
at the office or agency where such exchange occurs on (i) any Regular Record
Date and before the opening of business at such office or agency on the relevant
Interest Payment Date, or (ii) any Special Record Date and before the opening of
business at such office or agency on the related proposed date for payment of
Defaulted Interest, then interest or Defaulted Interest, as the case may be,
will not be payable on such Interest Payment Date or proposed date for payment,
as the case may be, in respect of such Registered Security, but will be payable
on such Interest Payment Date or proposed date for payment, as the case may be,
only to the Holder hereof, and the Holder hereof will undertake in such
circumstances to credit such interest to the account or accounts of the Persons
who were the beneficial owners of such portion of this Security on such Regular
Record Date or Special Record Date, as the case may be.

     Payment of the principal of and any such interest on this Security will be
made at the offices of The Chase Manhattan Bank, as Paying Agent, in the Borough
of Manhattan, The City of New York, or at such other office or agency of the
Company as may be designated by it for such purpose in the Borough of Manhattan,
The City of New York, in such coin or currency of the United States of America
as at the time of payment shall be legal tender for the payment of public and
private debts by check mailed to the registered Holders thereof; provided,
                                                                 --------
however, that at the option of the Holder, payment of interest may be made by
- -------
wire transfer of immediately funds to an account of the Person entitled hereto
as such account shall be provided to the Security Registrar and shall appear in
the Security Register.

                                       3


     The Securities shall be redeemable, in whole or in part, at the Company's
option at any time.  The Redemption Price for the Securities to be redeemed
shall equal the greater of the following amounts, plus, in each case, accrued
interest thereon to the Redemption Date:

     .    100% of the principal amount of such Securities; or

     .    as determined by the Independent Investment Banker (as defined below),
          the sum of the present values of the remaining scheduled payments of
          principal and interest on the Securities (not including any portion of
          any payments of interest accrued from the most recent Interest Payment
          Date to which interest has been paid to the Redemption Date)
          discounted to the Redemption Date on a semiannual basis at the
          Adjusted Treasury Rate (as defined below) plus 20 basis points.

The Redemption Price shall be calculated by the Independent Investment Banker
assuming a 360-day year consisting of twelve 30-day months.

     "Adjusted Treasury Rate" means, with respect to any Redemption Date:

     .    the yield, under the heading which represents the average for the
          immediately preceding week, appearing in the most recently published
          statistical release designated "H.15(519)" or any successor
          publication which is published weekly by the Board of Governors of the
          Federal Reserve System and which establishes yields on actively traded
          United States Treasury securities adjusted to constant maturity under
          the caption "Treasury Constant Maturities," for the maturity
          corresponding to the Comparable Treasury Issue (if no maturity is
          within three months before or after the remaining term of the
          Securities, yields for the two published maturities most closely
          corresponding to the Comparable Treasury Issue will be determined and
          the Adjusted Treasury Rate will be interpolated or extrapolated from
          such yields on a straight line basis, rounding to the nearest month);
          or

     .    if such release (or any successor release) is not published during the
          week preceding the calculation date or does not contain such yields,
          the rate per annum equal to the semiannual equivalent yield to
          maturity of the Comparable Treasury Issue, assuming a price for the
          Comparable Treasury Issue (expressed as a percentage of its principal
          amount) equal to the Comparable Treasury Price for such Redemption
          Date.

     The Adjusted Treasury Rate shall be calculated on the third Business Day
preceding the Redemption Date. The Company shall notify the Trustee, in an
Officers' Certificate, of the Redemption Price no later than the second Business
Day preceding the Redemption Date. The Officers' Certificate shall set forth the
Redepmtion Price both as an aggregate amount for all the Securities to be
redeemed and as an amount per $1,000 in principal amount of the Securities to be
redeemed.

     "Comparable Treasury Issue" means the United States Treasury security
selected by the Independent Investment Banker as having a maturity comparable to
the remaining term of the Securities to be redeemed that would be utilized, at
the time of selection and in accordance with customary financial practice, in
pricing new issues of corporate debt securities of comparable maturity to the
remaining term of such Securities.

                                       4


     "Comparable Treasury Price" means, with respect to any Redemption Date, (A)
the average of five Reference Treasury Dealer Quotations for such Redemption
Date, after excluding the highest and lowest such Reference Treasury Dealer
Quotations, or (B) if the Independent Investment Banker obtains fewer than five
such Reference Treasury Dealer Quotations, the average of all such quotations.

     "Independent Investment Banker" means Goldman, Sachs & Co. and its
successors, or if that firm is unwilling or unable to serve as such, an
independent investment and banking institution of national standing appointed by
the Company.

     "Reference Treasury Dealer" means:

     .    Goldman, Sachs & Co. and its successors; provided that, if Goldman,
          Sachs & Co. ceases to be a primary U.S. Government securities dealer
          in New York City ("Primary Treasury Dealer"), the Company will
          substitute another Primary Treasury Dealer; and

     .    up to four other Primary Treasury Dealers selected by the Company.

     "Reference Treasury Dealer Quotation" means, with respect to each Reference
Treasury Dealer and any Redemption Date, the average, as determined by the
Independent Investment Banker, of the bid and asked prices for the Comparable
Treasury Issue (expressed in each case as a percentage of its principal amount)
quoted in writing to the Independent Investment Banker by such Reference
Treasury Dealer at 5:00 p.m. (New York City time) on the third business day
preceding such Redemption Date.

     Notice of redemption shall be given as provided in Section 1104 of the
Indenture; provided, that such notice shall not be required to include the
Redemption Price but shall instead include the manner of calculation of the
Redemption Price.  If the Company elects to partially redeem the Securities, the
Trustee will select in a fair and appropriate manner the Securities to be
redeemed.

     Unless the Company defaults in payment of the Redemption Price, on and
after the Redemption Date interest will cease to accrue on the Securities or
portions thereof called for redemption.

     If an Event of Default with respect to Securities of this series shall
occur and be continuing, the principal of the Securities of this series
(including this Security and the interests represented hereby) may be declared
due and payable in the manner and with the effect provided in the Indenture.
Upon payment (i) of the amount of principal so declared due and payable and (ii)
of interest on any overdue principal and overdue interest (in each case to the
extent that the payment of such interest shall be legally enforceable), all of
the Company's obligations in respect of the payment of the principal of and any
interest on the Securities of this series (including this Security and the
interests represented hereby) shall terminate.

                                       5


     The Indenture contains provisions for defeasance at any time of (a) the
entire indebtedness of the Company on this Security and (b) certain restrictive
covenants and the related defaults and Events of Default, upon compliance with
certain conditions set forth therein, which provisions shall apply to this
Security.

     The provisions of Article Fourteen of the Indenture apply to Securities of
this series.

     The Indenture permits, with certain exceptions as therein provided, the
amendment thereof and the modification of the rights and obligations of the
Company and the rights of the Holders of the Securities of each series to be
affected under the Indenture at any time by the Company and the Trustee with the
consent of the Holders of a majority in aggregate principal amount of the
Securities at the time Outstanding of each series affected thereby.  The
Indenture also contains provisions permitting the Holders of specified
percentages in aggregate principal amount of the Securities of each series at
the time Outstanding on behalf of the Holders of all Securities of such series
to waive compliance by the Company with certain provisions of the Indenture and
certain past defaults under the Indenture and their consequences.  Any such
consent or waiver by the Holder of this Security shall be conclusive and binding
upon such Holder and upon all future Holders of this Security  and the Persons
who are beneficial owners of interests represented hereby, and of any Security
issued in exchange herefor or in lieu hereof whether or not notation of such
consent or waiver is made upon this Security.

     As set forth in, and subject to, the provisions of the Indenture, no Holder
of any Security of this series will have any right to institute any proceeding
with respect to the Indenture or for any remedy thereunder, unless such Holder
shall have previously given to the Trustee written notice of a continuing Event
of Default with respect to the Securities of this series, the Holders of not
less than 25% in aggregate principal amount of the Outstanding Securities of
this series shall have made written request, and offered reasonable indemnity,
to the Trustee to institute such proceeding as trustee, and the Trustee shall
not have received from the Holders of a majority in aggregate principal amount
of the Outstanding Securities of this series a direction inconsistent with such
request and shall have failed to institute such proceeding within 60 days;
provided, however, that such limitations do not apply to a suit instituted by
the Holder hereof for the enforcement of payment of the principal of (and
premium, if any) or interest on this Security on or after the respective due
dates expressed herein.

     No reference herein to the Indenture and no provision of this Security or
of the Indenture shall alter or impair the obligation of the Company, which is
absolute and unconditional to pay the principal of (and premium, if any) and
interest on this Security at the time, place and rate, and in the coin or
currency, herein prescribed.

     As provided in the Indenture and subject to certain limitations therein and
herein set forth, the transfer of Registered Securities of the series of which
this Security is a part may be registered on the Security Register of the
Company, upon surrender of such Securities for registration of transfer at the
office of the Security Registrar, duly endorsed by, or accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar duly executed by the Holder thereof or his attorney duly authorized in
writing, and thereupon one or two more new Securities of this Series and of like
tenor, of authorized

                                       6


denominations and for the same aggregate principal amount, will be issued to the
designated transferee or transferees.

     No service charge shall be made for any such registration of transfer or
exchange of Securities as provided above, but the Company may require payment of
a sum sufficient to cover any tax or other governmental charge payable in
connection therewith.

     Prior to due presentment of this Security for registration of transfer, the
Company, the Trustee and any agent of the Company or the Trustee may treat the
Person in whose name this Security is registered as the owner hereof for all
purposes, whether or not this Security be overdue, and neither the Company, the
Trustee nor any such agent shall be affected by notice to the contrary.

     The Securities of this series of which this Security is a part are issuable
only in registered form without coupons, in denominations of $1,000.00 and any
integral multiple thereof.  As provided in the Indenture and subject to certain
limitations therein set forth, the Securities of this series are exchangeable
for a like aggregate principal amount of Securities of this series and of like
tenor of a different authorized denomination, as requested by the Holder
surrendering the same.

     The Securities of this series shall be dated the date of their
authentication.

     All terms used in this Security which are defined in the Indenture shall
have the meanings assigned to them in the Indenture.

     Unless the certificate of authentication hereon has been executed by or on
behalf of The Chase Manhattan Bank, the Trustee under the Indenture, or its
successor thereunder, by the manual signature of one of its authorized officers,
this Security shall not be entitled to any benefit under the Indenture or be
valid or obligatory for any purpose.

                                       7


     IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated: March 13, 2001                  CSX CORPORATION


[Seal]                                 By:______________________________________
                                       Name:  David A. Boor
                                       Title: Vice President and Treasurer

Attest:


_______________________________________
     Assistant Corporate Secretary



                    TRUSTEE'S CERTIFICATE OF AUTHENTICATION

     This is one of the Securities of a series issued under the Indenture
described herein.



                                       THE CHASE MANHATTAN BANK,
                                       as Trustee

                                       By:________________________________
                                           Authorized Officer


                            FORM OF TRANSFER NOTICE

     FOR VALUE RECEIVED the undersigned registered holder hereby sell(s),
assign(s) and transfer(s) unto

Insert Taxpayer Identification No.
- ----------------------------------

________________________________________________________________________________
Please print or typewrite name and address including zip code of assignee

________________________________________________________________________________
the within Security and all rights thereunder, hereby irrevocably constituting

and appointing _______________________________________ attorney to transfer said
Security on the books of the Security Registrar with full power of substitution
in the premises.

Date:___________         ____________________________________________________
                         NOTICE:  The signature to this assignment must
                         correspond with the name as written upon the face of
                         the within-mentioned instrument in every particular,
                         without alteration or any change whatsoever.

                                       9


                                                                       EXHIBIT A
                                                                       ------- -

                             Schedule of Exchanges
                             ---------------------


                                      10