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.
Double-decker bus
SBS Transit's exclusivity on double-decker buses in Singapore lasted until 2014, when rival SMRT Buses ordered 201 Alexander Dennis Enviro500 buses. It was followed up with 16 MAN ND323Fs in 2015.