Track access controller: Difference between revisions

Revision as of 14:27, 26 February 2016

Revision as of 14:29, 26 February 2016

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'''Track Access Controller''' (known as TAC) is a [[life-critical system|safety-critical]] job role in the [[London Underground]]. TACs work mostly at night and protect workers in the track environment, during "[[Engineering]] hours" when [[TractionRailway powerelectrification networksystem|traction]] current]] is switched off and passenger trains have stopped running. Using Line Safe and Line Clear rules, they protect engineering workers from traction current, as well as moving trains and vehicles.

Each Track Access Controller has responsibility for an area of the Underground railway. This could be a part of an underground line or the entire line, depending how much work is being carried out. Some lines are so busy that a number of Track Access Controllers may be responsible for the same area of the track.