The U.S. rail transit system is a vital component of the nation's transportation infrastructure, carrying millions of people daily. Unlike most transportation modes, safety and security oversight of rail transit is the responsibility of state-designated oversight agencies following Federal Transit Administration (FTA) requirements. In addition, in 2001, Congress passed the Aviation and Transportation Security Act, giving the Transportation Security Administration (TSA) authority for security over all transportation modes, including rail transit. This testimony is based on ongoing work for this subcommittee's committee-the House Committee on Transportation and Infrastructure. I describe (1) how the State Safety Oversight program is designed; (2) what is known about the impact of the program on rail safety and security; and (3) challenges facing the program. I also provide information about oversight of transit systems that cross state boundaries. To address these issues, we reviewed program documents and interviewed stakeholders including officials from FTA, TSA, the National Transportation Safety Board, and