Miles, or Revenue Kilometers, operated by vehicles in passenger service. (TRB)
Movements of vehicles and operation of associated apparatus for the purpose of carrying passengers in scheduled service, including the movements of vehicles to and from regular storage locations, but not including service, inspection, maintenance and emergency operations.
The transportation of fare paying passengers. (NTSC)
Total number of scheduled hours that a vehicle is in revenue service. Excludes hours spent traveling to and from storage facilities and during other non-service travel.
Passenger-carrying buses and rail cars. This contrasts with non-passenger carrying vehicles or trains, used to build or maintain facilities, provide supervision, and so on.
The number of miles (kilometers) of track used exclusively in nonrevenue service. (TRB)