fleet in the United States, only because Houston was the largest major city devoid of any rail transit since 1990. Circa 1991 bus services for handicapped people were implemented. In 2015, the bus system was redesigned, eliminating low-ridership routes in favor of a high-frequency, high-demand bus network. This change was accomplished without any increase in operating costs. Service types LocalMost Metro buses typically operate on city streets, with the majority of routes serving several of Houston's major employment centers. The routes are grid-like "crosstown" routes that travel from one part of the city to another without entering downtown (many of these run along North-South arterial streets, such as Gessner, Lockwood, Post Oak & Shepherd or East-West arterials like Tidwell, Bellfort, Westheimer and Beechnut). Express routes are local limited stop service, not in the sense of limited stop service on major streets, but more likely run as a regular stop route and simply have no stops along a major freeway and serve major employment areas such as Greenspoint, Westchase, Memorial City, Downtown, Midtown and Sharpstown. Former bus routes that served downtown prior to the opening of METRORail were rerouted to terminate at METRORail stations to eliminate duplicate service and long trips. ExpressSome routes like the 102,108,137 provide express service to some of Houston's key destination such as Downtown, Bush IAH, Memorial City, etc. Unlike Park and Ride service they make limited stops on service streets and travel nonstop on Freeway segments. Before several routes upgraded from Limited to Express with Metro's New Bus Network, they were categorized as Limited as they do not make stops along the freeway portions of the route for at least between downtown and other areas. The only remaining true express route was the 170 Missouri City Express until it was also put under the Park & Ride (Commuter) Service. Park and Ride (Commuter)Metro provides a well known Park and Ride service that serves riders who work downtown, Greenway Plaza, Uptown and The Texas Medical Center and live in outlying residential neighborhoods in the city of Houston, as well as several suburbs, where Park and Ride lots are located. A Park and Ride lot functions much like a transit center, and some Park and Ride lots are served by regular local routes in addition to the dedicated Park and Ride routes. During rush hour, each Park and Ride lot has its own route to reduce overcrowding, leading