EXHIBIT 5 [CSX LETTERHEAD] March 7, 2000 CSX Corporation One James Center 901 E. Cary Street Richmond, Virginia 23219 Ladies and Gentlemen: I am General Counsel-Corporate of CSX Corporation (the "Company") and am providing this opinion in connection with the filing with the Securities and Exchange Commission of a registration statement on Form S-8 (the "Registration Statement") relating to the Greenbrier Savings and Investment Plan and Trust (the "Plan"). The Registration Statement covers 50,000 shares of Common Stock of the Company (the "Common Stock") which have been reserved for issuance under the Plan and Rights to purchase Preferred Stock associated with the Common Stock (the "Rights"). In connection with the foregoing, I have made such legal and factual examinations and inquiries as I have deemed necessary or advisable for the purpose of rendering this opinion. Based upon the foregoing, I am of the opinion that: 1. The 50,000 shares of Common Stock, when issued or sold in accordance with the terms and provisions of the Plan, will be duly authorized, validly issued, fully paid and non-assessable. 2. All corporate action required under the laws of the Commonwealth of Virginia has been taken for the Rights, when issued in accordance with the terms and provisions of the Rights Agreement, dated as of May 29, 1998, between the Company and Harris Trust Company of New York, as rights agent, to be validly issued. I hereby consent to the filing of this opinion as Exhibit 5 to the Registration Statement. I do not admit by giving this consent that I am in the category of persons whose consent is required under Section 7 of the Act. Very truly yours, /s/ ELLEN M. FITZSIMMONS ------------------------- Ellen M. Fitzsimmons General Counsel-Corporate