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TTC extends automatic train-control signalling as far south as St Patrick station



Sunday, May 12, TTC trains on the section of the Line 1 Yonge - University subway between Dupont and St Patrick stations started operating with the automatic train-control (ATC) system. In a news release, the TTC explains that trains along the entire section of Line 1 between Vaughan Metropolitan Centre and St Patrick now use “the more reliable signalling system.”

Crews completed upgrading and testing ATC during last weekend’s subway closure, with the system going live when full subway service resumed early, at noon Sunday. The TTC says, “This milestone in ATC installation means fewer delays associated with the older fixed-block signalling system along this section of Line 1.”

TTC crews spent nine months installing the communications system between Dupont and St Patrick stations and installed more than 30,480 metres (100,000 feet) of cable and more than 500 track-side components.

Parts of the TTC’s signal system date back to the 1950s, when the first section of Line 1 opened. (The section from Dupont to St George dates from 1977; the section from St George to St Patrick from 1963.) According to the TTC, ATC reduces signal-related delays on the subway network, increases safety, improves travel times and lowers operating costs.

As the TTC continues to install ATC on the rest of Line 1, it will also continue to close the subway weekends. The TTC states that “ATC is proven technology that is in operation at more than 100 subway systems throughout the world such as Hong Kong, Shanghai, London and Paris. Like new systems elsewhere, TTC’s Line 1 extension [between Vaughan Metropolitan Centre and Sheppard West] has been running on the ATC system since it opened in December 2017.