The main purpose of this legislation is to transfer ownership of a specific piece of property, known as the Colma Park and Ride Lot, from the federal government to the San Mateo County Transit District. This transfer is intended to support local transit operations and improve transportation infrastructure in the area. The key provision of this legislation is the directive for the Secretary of Transportation to convey all rights and interests in the Colma Park and Ride Lot to the San Mateo County Transit District.