OpenTrainTimes already has something like this: it's a signalling diagram rather than a map (railways work in blocks of track rather than absolute train positio

OpenTrainTimes already has something like this: it's a signalling diagram rather than a map (railways work in blocks of track rather than absolute train position) and @poggs uses data from the signalling system to show what block a service is in. See http://www.opentraintimes.com/maps http://www.opentraintimes.com/maps