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) |
Read more about this topic: Toronto Subway And RT Signals
Famous quotes containing the words signal and/or numbers:
“Perhaps having built a barricade when you’re sixteen provides you with a sort of safety rail. If you’ve once taken part in building one, even inadvertently, doesn’t its usually latent image reappear like a warning signal whenever you’re tempted to join the police, or support any manifestation of Law and Order?”
—Jean Genet (1910–1986)
“The forward Youth that would appear
Must now forsake his Muses dear,
Nor in the Shadows sing
His Numbers languishing.”
—Andrew Marvell (1621–1678)