Potomac and Rappahannock Transportation Commission (PRTC) is an American public transportation system in Prince William County, Virginia, Stafford County, Virginia, and Spotsylvania County, Virginia, plus two adjacent independent cities, Manassas and Manassas Park. Services provided by PRTC include OmniRide, OmniRide Local, and OmniRide Ridesharing Service operating in Prince William County, Manassas, Manassas Park, and Stafford County. Spotsylvania County's membership is solely based on a membership requirement due to the VRE operations in the county and the state aid that comes with the VRE. In 2021, the system had a ridership of 925,900, or about 6,000 per weekday as of the second quarter of 2022.