Operating procedures Northern City Line



ncl start of procedures sign & platform starter signal @ drayton park


because mainline trains operate on infrastructure inherited london underground there practices on ncl differ railway rulebook instructions, , these contained in additional publication. these include:


passing signals @ danger

if train standing @ signal @ danger inside tunnel , driver unable contact signaller, permitted pass signal under own authority. starts move, tripcock on train operate , stop train must reset before continuing. must proceed caution, prepared stop short of obstruction, , travel no faster 3 mph (4.8 km/h). when reaches next signal must stop , attempt contact signaller inform him of has taken place regardless of aspect showing.


platform starter signals (which let train tunnel) can passed @ danger signaller s authority.


assisting failed train

unlike surface lines, driver of train fails on ncl not required leave train lay detonators , wait assisting train. driver remains train , signaller authorise driver of assisting train proceed rear of failed train @ maximum speed of 3 mph (4.8 km/h). ensure rear of failed train visible, trains working on ncl required display 3 red lights @ rear: 2 tail lamps plus red portion of destination roller blind.


on reaching failed train, assisting driver stop short clip tunnel telephone onto tunnel wires can discuss driver of failed train how carry out assistance in order trains moving again. 2 trains coupled , drivers can talk each other on usual cab-to-cab handsets before proceeding.








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