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.
Single-deck bus
With the exception of regions of major double deck or articulated bus operation, usually urban areas, the single decker is the standard mode of public transport bus travel, increasingly with low floor features.