Single-deck bus

These types of single-deckers may feature one or more doors, and varying internal combustion engine positions.

The majority of single-deckers have a length of up to 12 m (39 ft 4 in), although some exceptions of longer buses exist.

With the exception of regions of major double deck or articulated bus operation, usually major urban areas such as Hong Kong, cities in the United Kingdom and Singapore, the single decker is the standard mode of public transport bus travel, increasingly with low floor features.

Midibuses can also be regarded as both included with and separate from standard single-deckers, in terms of full size length and vehicle weights, although again design developments have seen this distinction blurred.

Some coach style buses that do not have underfloor luggage space can also be correctly termed as single-deckers, with some sharing standard bus chassis designs, such as the Volvo B10M, with a different body style applied.