3 ms·
There were plans under British Rail [0] and Railtrack [1] to push running above 125 mph via realignments & resignalling. Virgin Trains proposed running at 135 m
by scrlk 4y ago
There were plans under British Rail [0] and Railtrack [1] to push running above 125 mph via realignments & resignalling. Virgin Trains proposed running at 135 mph via the Tilt Authorisation and Speed Supervision system [2].
[0] https://en.wikipedia.org/wiki/InterCity_250#Project_scope https://en.wikipedia.org/wiki/InterCity_250#Project_scope
[1] https://en.wikipedia.org/wiki/West_Coast_Main_Line#Modernistion_by_Network_Rail https://en.wikipedia.org/wiki/West_Coast_Main_Line#Modernist...
[2] https://en.wikipedia.org/wiki/West_Coast_Main_Line#Increased_line_speed https://en.wikipedia.org/wiki/West_Coast_Main_Line#Increased...
- tialaramex 4y agoA major problem you run into is that you really want in-cab signalling at these speeds and you might well do speed signalling when you take a big upgrade like that. A lineside position lamp arrangement which indicates "Caution: The next signal is at: Caution: The next signal is at: Caution: The next signal is at: DANGER" blurring past at 140mph is too much for humans to reliably appreciate their import and react to it in an efficient fashion. Trains on HS1 have TVM or equivalent, in-cab signalling. https://en.wikipedia.org/wiki/Transmission_Voie-Machine#Cab_display https://en.wikipedia.org/wiki/Transmission_Voie-Machine#Cab_... - you can see at a glance that the computer says you're going 269kph, the limit here is still 270kph, but the signals indicate the limit ahead will be 220kph so you should be braking.