Norwich to London timetabling and performance

steve_brown said:

...is the correct answer.

ARS (Automatic Route Setting) can make a regulating decision at a converging location, but once two trains are following one another it will not intervene, and cannot intervene because Mk I ARS can't deviate from a train's booked platform. The signaller can override the ARS but once this is done the train is out of ARS control and has to be manually signalled for the remainder of its schedule. Sounds like something from the stone age now, but bear in mind that ARS was written and implemented by BR Research in the early 1980's and the logic has remained largely unchanged ever since.

The "Luminate" overlay, as deployed on GWML, allows signallers to re-platform and regulate trains without removing them from ARS control, i.e. it re-programs the ARS version of the timetable.

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Malcolmffc said:

this isn’t true. ARS can be told to resume control of the train once it’s back on its planned path.

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