These are distinct from all-seated coaches used for intercity travel and smaller minibuses, for more flexible services.
"Bus means a rubber-tired automotive vehicle used for the provision of public transportation service by or for a recipient of FTA financial assistance.
A minibus is designed to transport 16 or more passengers (including the driver) and is typically built on a small truck chassis.
[3] Features of transit buses include: Modern transit buses are also increasingly being equipped with passenger information systems, multimedia, WiFi, USB charging points, entertainment/advertising, and passenger comforts such as heating and air-conditioning (in the early 20th century, no bus had cooling beyond opening the windows).
The passenger information systems inside the bus came about both because of digital technology and to meet accessibility requirements.
Early examples of such specification include the Greater Manchester Leyland Atlantean, and DMS-class London Daimler Fleetline.
Depending on local policies, transit buses will also usually have two, three or (for articulated) four doors to facilitate rapid boarding and alighting.
Transit buses are also now subject to various disability discrimination acts in several jurisdictions which dictate various design features also applied to other vehicles in some cases.
A commuter or express bus service is a fixed-route bus characterized by service predominantly in one direction during peak periods, limited stops, use of multi-ride tickets and routes of extended length, usually between the central business district and outlying suburbs.