Toronto Subway and RT Signals - Signal Numbers

Signal Numbers

All signals have an alpha-numeric number that relates to their location within the subway system. The number is assigned using the Chain system of measurement, whereby a signal's number is assigned based on the nearest chain measure.

Each line or portion of a line has an assigned letter, and that precedes the number ascertained by the Chain measure. Signals that are on a northbound portion of track use the nearest even valued chain measure, where signals on a southbound portion of track use the nearest odd valued chain measure.

Line Signal prefix Even Odd Chain 0 mark
Yonge N (northbound only)
S (southbound only)
northbound southbound Does not exist (continues from the University numbers)
University U northbound southbound South of St George station (counts up towards Museum)
Spadina SP northbound southbound North of St George station (counts up towards Spadina station (YUS))
Bloor-Danforth B westbound eastbound West of Kipling station (counts up towards Islington)
Sheppard SHP westbound eastbound West of Sheppard station (counts up towards Bayview)

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