Double-decker bus
With the exception of coaches, double-decker buses are uncommon in the United States. Many private operators, such as Megabus, run by Coach USA, employs double-decker buses on its busier intercity routes.
Optare MetroDecker
The Optare MetroDecker is an integral twin-axle double-decker bus manufactured by Optare. Unveiled in May 2014, four examples were built as demonstrators.