The bill H. 4122 establishes a High-Speed Rail System study committee in South Carolina to explore the potential for a high-speed rail system within the state, particularly in relation to the Southeast High-Speed Rail Corridor (SEHSR). The committee will consist of nine members, including three appointed by the Speaker of the House, three by the President of the Senate, two by the Governor, and one from the South Carolina Transportation Infrastructure Bank Board. Additionally, the Secretary of Commerce and the Director of the Department of Transportation, or their designees, will also serve on the committee. The committee's responsibilities include assessing the design, construction, financing, and operation of high-speed rail services, coordinating planning efforts, and maximizing federal funding opportunities.

The study committee is required to report its findings and recommendations to the General Assembly by January 1, 2026. The expenses incurred by the committee will be covered by the approved accounts of both houses, and while members will serve without pay, they will be entitled to mileage, subsistence, and per diem as per state law. The joint resolution will take effect upon the Governor's approval.