- Vehicle and Operator Services Agency
The Government agency responsible for dealing with certain kinds of commercial road-based operators, including bus service providers. Companies are required by Law to submit confirmed changes at least 56 days before said changes are implemented, although in special situations that can be relaxed.
Traveline: A service funded by public transport companies across the country. Its aim is to provide comprehensive information on bus services on a regional basis, with some overlap between departments, to assist passengers in getting where they need to go, whilst also providing lesser information on other forms of public transport. Its information is relayed to councils who then update their own information based on this data, so operators endeavour to provide Traveline with up-to-date information at all times. A similar entity named Transport Direct deals with travel on a national basis, including private forms of transport and aviation.
- Traffic Commissioner
A Government official responsible for overseeing bus services throughout their respective regions. They have the power to summon and discipline bus service providers whom they deem to be providing an inadequate service, especially where services run unreasonably poorly and/or are changed without permission. In exceptional circumstances, they can withdraw operators^ licences to provide services.
- Timing Point
A point on any bus service, usually but not always represented by a bus stop, at which buses are expected to arrive and/or depart at the time indicated. Notwithstanding exceptional circumstances such as roadworks, operators are required to ensure that 95% of services serve all timing points within the window of not more than one minute early or five minutes late.
- Running Number
A number used to identify the specific duty any one bus is following for a day, with variations across the country. Other names are sometimes applied, such as car number, carriage number, car run, diagram or duty. Running cards are allocated to vehicles to identify its service for the day and may or may not make their instructions obvious through their number alone.
- Contracted Service
A journey that is operated according to a contract between two or more organisations, at least one of whom is a bus service provider. Most contracts of this nature provide financial benefit to the operator, usually from a council, and are legally required to be put out to tender among interested parties; payments vary in amount and means although values of around 4 per passenger journey are typical. Some contracts involve paying the relevant authority for the right to run the service instead of receiving a subsidy. In London, contracts involve Transport for London receiving all fares and instead paying operators a set fee.
- Commercial Service
A journey operated without financial assistance of any kind. Services of this kind are entirely dependent on its passengers to provide sufficient funds in the form of fares for it to sustain a profit. Some commercial services may be operated under contract to specific organisations with no financial benefit to speak of other than fare income.
- PVR (Peak Vehicle Requirement)
The maximum number of buses required to keep a service (or groups of services where they share vehicles) operating correctly. This can usually be calculated through careful observation of the timetable; a service that runs every 15 minutes and takes 40 minutes from end-to-end would usually have a Peak Vehicle Requirement of six vehicles (with a five-minute layover at either end).
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