Toronto subway and RT stations: overview, lines, and notable stations

Network and lines

The heavy-rail network is organized into several numbered lines, each with distinct corridors and service patterns. Key lines include:

• Line 1 Yonge–University — the original and busiest corridor, running in a U-shaped route through the city and first built beneath Yonge Street.
• Line 2 Bloor–Danforth — an east–west trunk that connects many neighbourhoods across midtown Toronto.
• Line 4 Sheppard — a shorter east–west line in the northern part of the city.
• Line 3 Scarborough RT — a light rapid transit line originally serving eastern Scarborough; it was a unique technology within the system and has seen major service changes in recent years.

Beyond these, the network has been expanding with light-rail projects designed to extend rapid transit reach and add nearly 30 kilometres of new track in the 2020s. For background on the system’s length and technical data, see the network summary at system information.

Stations: types, design and accessibility

Stations vary in design according to era and location. Older stations on the original routes tend to feature tilework and compact mezzanines, while newer stations incorporate larger concourses, heated platforms, public art and easier step-free access. Accessibility upgrades have been a long-term priority: elevators, tactile wayfinding, and improved signage are being added incrementally to meet modern standards.

History and development

Toronto’s subway began service in the mid-20th century and expanded through successive phases of postwar growth and late-20th-century investment. Major interchange stations—such as Bloor–Yonge, St. George and Union—developed into transit hubs linking subway platforms with commuter rail, bus terminals and pedestrian pathways. The city’s rapid-transit plan in the 21st century emphasizes light-rail corridors and infill stations to serve denser, transit-supportive corridors.

Uses, importance and notable stations

The system carries millions of passenger trips annually and supports economic activity, commuting and tourism. Notable stations include Union Station, Toronto’s principal intermodal hub and gateway for regional rail; Bloor–Yonge, the system’s busiest interchange; and Kennedy, a major transfer point with suburban bus services. Service changes, station refurbishments and network extensions are often staged to minimize disruption while improving capacity.

Current projects, changes and further reading

Several expansion and modernization projects have been undertaken or planned to increase capacity, improve accessibility and extend rapid transit to growing neighbourhoods. New light-rail lines and station additions are part of a broader regional strategy to expand rapid transit coverage. For project overviews and updates about light rail initiatives, see resources on light rail projects and regional rankings at North American transit comparisons. Additional technical and station-level information can be found in system planning documents and publicly available station lists at network information and the operator’s pages at the TTC.