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'''Track Access Controller''' is a safety related job post in the [[London Underground]]. They mostly work at night during "Engineering hours" when traction current is switched off and passenger trains have stopped running.
Each Track Access Controller has responsibility for an underground line (e.g. the East London line) or part of an underground line. Some lines such as the Northern line are so long and so busy that on some nights, up to 3 Track Access Controllers may be responsible for different parts of the track.
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