TRB’s Transit Cooperative Research Program (TCRP) Web Document 13: The Cost of Meeting Accessibility Requirements for Over-the-Road Buses addresses the cost of over-the-road bus (OTRB) operators for complying with the final OTRB Accessibility Rule of the Americans with Disabilities of 1990 (ADA). This report presents ranges of estimates for capital, training, and maintenance cost – within the broader context of other costs and revenue issues.