The Toronto subway and RT is the main rapid transit (RT) railway system in Toronto, Ontario, Canada. It is run by the Toronto Transit Commission (TTC). Since the first part under Yonge Street opened in 1954 with 12 stations, the system has grown to be Canada's biggest rapid transit rail system. It has four lines and 69 stations on 68.3 km of track. The subway system is used very often and has the most number of passengers of any system in Canada. It has an average of 948,100 passenger trips each weekday (as of 2010).

The system is was made bigger on the western part of the Yonge–University Line with new tracks and stations being made north to York University, Steeles Avenue, and Vaughan Corporate Centre in York Region. The Government of Ontario said on March 23, 2006 that it will give $670 million for this new work, which is less than one-third of the total money needed. The new track is about 8.6 km long and was built with six new stations: Downsview Park, Finch West, York University, Pioneer Village, Highway 407, and the Vaughan Metropolitan Centre. It was expected to cost about $2 billion.

Toronto's subway network

History 

The first part of the subway, replaced a very busy streetcar route, and followed Yonge Street from Eglinton Avenue south to Front Street, then turned west for one block to end at Bay Street, next to the city's main railway station Union Station and so the subway station was also called Union. This line was finished in 1954 and was 7.4 km long.

In 1963 another part was added, that went north from Union station, below University Avenue and Queen's Park to near Bloor Street, where it turned west to end at St. George and Bloor Streets.

The Bloor-Danforth Line opened up in 1966 along Bloor Street and Danforth Avenue from Keele Street to Woodbine Avenue, and was made longer in 1968 to run from Islington Avenue to Warden station at Warden and St. Clair Avenues.  

The routing of the line across the Don Valley was possible because of a choice made more than forty years before. When the Prince Edward Viaduct was built across the Don River in 1919, its design included twin decks below the road to allow for future rail lines. This made it possible for the subway to cross the Don Valley to Danforth Avenue on the east side.

The Yonge-University line was extended north 8.7 km from Eglinton Avenue to Finch Avenue and Yonge in 1973 and 1974.

More track (9.9 km) was added to the Yonge-University Line in 1978 when it was extended from St. George and Bloor, north and northwest to Eglinton Avenue and Allen Road, then north along the middle of Allen Road to Wilson Avenue. 

In October 1976, an arson (a fire set on purpose) destroyed subway cars and damage to Christie station. This caused the closure of the Bloor-Danforth Line for three days, and closed Christie station for some time for repairs. More track was added in 1980 at both ends of the Bloor-Danforth Line. These extensions each added one station, bus bays, and, on the eastern end, room to  to the Scarborough RT.

With six stations on 6.8 km of track, the Scarborough RT is a line built almost all above the ground, and which has no direct tracks that connect to the other lines and uses a different trains. It uses the Intermediate Capacity Transit System (ICTS) trains which are very different from subway trains. The route is fully separate from road traffic and pedestrians, the stations are fully covered, and the trains have many doors that use high platforms. 

An extra 1.6 km was added to the north end of the Spadina part of the Yonge-University-Spadina Line, adding one station (Downsview), with parking for buses. 

In August 1995, the TTC had a really bad subway accident in what it calls the Russell Hill accident, on the Yonge-University-Spadina Line south of St. Clair West station. Three women died and 100 people were injured, a few badly. 

The subway's newest line, Sheppard, opened in 2002. It runs 5.5 km east, under Sheppard Avenue from Sheppard station on the Yonge line (now called Sheppard-Yonge), to Don Mills station at Sheppard and Don Mills Road. The Sheppard line has less users than the other two subway lines, and shorter trains run on it.

In its over fifty-year history, the first baby to be born on a TTC subway station platform only occurred recently on February 6, 2006.  This incident occurred at Wellesley station and caused delays on the subway system.  It was front-page news for many days.

An automatic voice system was added to  each station (such as; "The next station is Bloor, Bloor station.") which ended the need for the train operator to announce each stop. The automated system is used in the whole subway and RT system.

Plans for the future
Until recently, the TTC did not have plans to expand the subway during the last twenty years but only had plans to build new above-ground rapid transit lines based upon streetcars travelling in closed lanes on streets. Today there are plans to build new subway lines under the ground, including extensions to the Spadina-University line and two lines in the central section of the city south of Bloor-Danforth.

Operations and procedures
Like most subways, the Toronto subway/RT trains get electricity from a third rail that runs next to the tracks. 'Shoes' (pieces of metal that touch the third-rail) mounted on both sides of each coach for contact. Power is supplied at 600 V DC.

A train guard opens and closes the subway car doors, and makes sure no one is trapped in a door as the train leaves a station. The train guard tells the driver when it is okay to leave. The car carrying the guard can be identified by the white or the orange light outside the subway car.

Hours and frequency of operation

On weekdays and Saturday, subway service runs from approximately 6:00 am to 1:30 am, but Sunday service begins at 9:00 am. Start times on holidays may vary.

Stations

For complete lists and details of stations, lines, and their locations in the Toronto subway/RT system, see List of Toronto subway and RT stations.

Current stations
Most stations are named for the nearby road crossed by the line in question. A few are named for major landmarks, such as shopping centres or other transportation stations near the station. 

All trains stop at every station along their route and run the entire length of their line from end to end.

Emergencies

 TTC Special Constable Services are special constables who provide security and some law enforcement on the subway. The Toronto Police Service are still called for all other law enforcement needs
 Emergency medical services as dealt with by the Toronto EMS
 Fires are dealt with by the Toronto Fire Services

Notes

References
 
 
 
 Welcome Aboard - Tomorrow's Transit Today - UTDC 1985

Other websites

 Official TTC site
 Official TTC LRT expansion proposals
 News, history and discussion
 Rider efficiency guide 
 CBC Digital Archives: Going Underground: Toronto's Subway and Montreal's Metro
 The TTC on Freewebs 
 The TTC's Official Subway Travel Time Chart
 The New "T35A08" Train
 The TTC ride guide as searchable Google Map
 Yonge Subway North - Finch-407 Subway Link 

Toronto Transit Commission
Rapid transit systems
Rail transport in Canada