Park and ride facilities are parking lots located at transit stations or bus stops where commuters can leave their vehicles and complete trips by public transit. These facilities expand transit's reach beyond walking distance of stations, enabling suburban residents to use rapid transit for portions of their commutes. Park and rides reduce downtown parking demand and traffic congestion while expanding transit ridership. Municipal and regional transit agencies develop park and ride facilities, balancing costs of providing parking against benefits of increased ridership. Site selection, capacity, security, and integration with surrounding land use are key planning considerations.