Selective vehicle detection is, or was, the name of a
bus priority system used by
London Buses
London Buses is the subsidiary of Transport for London (TfL) that manages most bus services in London, England. It was formed following the Greater London Authority Act 1999 that transferred control of London Regional Transport (LRT) bus se ...
to allow traffic signals to selectively favour buses' movement through intersection by changing
traffic light sequences and timings as buses approach.
, the system worked using 'bus detectors' mounted on lampposts and similar posts by the side of the road, which detect transmission made by transmitters aboard buses, developed as part of
Transport for London's
Countdown
A countdown is a sequence of backward counting to indicate the time remaining before an event is scheduled to occur. NASA commonly employs the terms "L-minus" and "T-minus" during the preparation for and anticipation of a rocket launch, and eve ...
bus tracking system.
[The way ahead for London's bus priority at traffic signals]
/ref> TfL was, at that time, considering whether to use newer, GPS-based, bus location systems to supplant the existing beacon-based infrastructure.[
, a new bus location system, Countdown II, was in the process of being commissioned.]
See also
* London iBus system
References
External links
Bus priority at traffic signals keeps London's buses moving
Siemens Selective Vehicle Detection
Attitudes to bus priority schemes
Review of bus priority at traffic signals around the world
Attitudes to bus priority schemes – Research Summary
Traffic signals
Road transport in London
Bus transport in London
Road traffic management
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