Today, GO Transit operates a combination of single-level coach buses and commuter-type double-decker buses. All buses are equipped with bike racks and are wheelchair accessible. Most of the older buses in the fleet are , single-level D4500CT coach buses built by Motor Coach Industries, which can seat 57 people and features a wheelchair lift for disabled users. The first models of this type entered service in 2001 and orders have continued until 2015. In April 2008, GO began operating Enviro 500 double-decker buses built by British manufacturer Alexander Dennis in the United Kingdom. These buses come in three different designs differing mainly in their size and height. All double deckers have a low-floor design and a wheelchair ramp at the front door.