Toronto Subway Automatic Train Control Resignalling
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Line 1's resignalling finished in September 2022, seven years late. The trains berth themselves but an operator stays in the cab; what automation removed was the second crew member.
what does this mean?
The strongest source is the operator's or the city's own reporting — an official report, dataset or press release. It grades who did the looking — not how well the project went. All four grades →Part of 1001 Smart Cities — 1,167 documented projects · 🏙️ 9 more in Toronto · 🚌 Public transport guide · 🚲 Mobility projects
The TTC replaced 1950s fixed-block signalling on Line 1 Yonge-University with Alstom moving-block CBTC, finishing in September 2022 — seven years past the original 2009 contract's August 2015 target, and already three years late and C$98M over budget at a 2019 checkpoint. Trains accelerate, cruise and berth themselves, but an operator stays in the cab; what automation actually removed was the second crew member, with one-person operation covering all of Line 1 from November 2022. The TTC says the line now runs about 30 trains per hour at peak instead of about 25. Line 2 Bloor-Danforth is a separate, later retrofit: Hitachi Rail Canada won the contract in July 2026, with completion scheduled for 2037.
📊 Impact
TTC figures: about 30 trains per hour at peak on Line 1, up from about 25, and roughly 33,000 passengers per hour, up from about 28,000. The TTC also reports signal-related delays falling after late 2022. Both are agency self-reported figures; no independent evaluation of delivered headways was found.
🎓 Lesson
Ask what a resignalling retrofit actually buys. Toronto's payoff shows up in crew positions and delay minutes more than in headway: ATC let the TTC drop the guard from every Line 1 train, while the advertised capacity gain remains the agency's own number and is capped well below what moving-block signalling can theoretically deliver by terminal turnback limits, not by the signals.
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📎 Cite this project
1001 Smart Cities (2026). “Toronto Subway Automatic Train Control Resignalling” — Toronto, Canada. The Smart City Atlas. https://1001smartcities.org/projects/toronto-ttc-automatic-train-control/ (last verified 2026-07-26). Data: CC BY 4.0.
The underlying data is free to reuse with attribution — see the open data page.