AMENDMENT 0001 (June 25, 2026): The purpose of this amendment is to provide answers to three questions submitted. Refer to all attachment "6913G626R200002 0001" provided. The proposal due date and all other solicitation provisions and requirements remain unchanged. POSTING ( June 17, 2026): This Request for Proposals (RFP) is for a multi-award, Indefinite Delivery/Indefinite Quantity (IDIQ) contract vehicle conducted under full and open competition. These contracts provide for commercial rail products and services including but not limited to manufacture and refurbishment of locomotives, freight cars, railcar movers, and associated rolling stock; preventive maintenance and inspection services; corrective repair and overhaul; engineering diagnostics and technical support; and emergency repair services as described in accordance with Section C, Statement of Work.