Template:GO rail change
| Corridor | Colors | Date | Stations | Length | Track ownership | Note | ||
|---|---|---|---|---|---|---|---|---|
| Lakeshore (unified West and East) |
1967-05-23 | 16 | 86.4 kilometres (53.7 mi) | 0 kilometres (0.0 mi) | 0% | Initial service. | ||
| 1968-04-26 | 15 | Lorne Park station closed. | ||||||
| 1968-11-09 | 16 | Exhibition opened. | ||||||
| Georgetown | 1974-04-29 | 22 | 134.4 kilometres (83.5 mi) | New line opened. | ||||
| 1974-12-01 | 23 | Etobicoke North opened. | ||||||
| Richmond Hill | 1978-05-01 | 27 | 168.6 kilometres (104.8 mi) | New line opened. | ||||
| Milton | 1981-10-26 | 34 | 219.0 kilometres (136.1 mi) | New line opened. | ||||
| Bradford Stouffville |
1982-09-07 | 44 | 332.0 kilometres (206.3 mi) | New lines opened. | ||||
| Lakeshore West | 1988-09-19 | 45 | Appleby opened. | |||||
| Lakeshore East | 1988-12-04 | 47 | 346.3 kilometres (215.2 mi) | 14.3 kilometres (8.9 mi) | 4.1% | Service extended to Whitby over newly-constructed GO subdivision. | ||
| Bradford | 1990-09-17 | 48 | 375.1 kilometres (233.1 mi) | 3.8% | Service extended to Barrie. | |||
| Georgetown | 1990-10-29 | 49 | 406.4 kilometres (252.5 mi) | 3.5% | Service extended to Guelph. | |||
| Lakeshore West | 1992-05-25 | 50 | Aldershot opened. | |||||
| Bradford Georgetown |
1993-07-05 | 48 | 346.3 kilometres (215.2 mi) | 4.1% | Service cut from Barrie and Guelph. | |||
| Lakeshore East | 1995-01-09 | 49 | 350.6 kilometres (217.9 mi) | 18.7 kilometres (11.6 mi) | 5.3% | GO subdivision and service extended to Oshawa. | ||
| Lakeshore West | 1996-04-29 | 351.6 kilometres (218.5 mi) | Hamilton service shifted to Hamilton GO Centre. | |||||
| Milton | 1997-03-31 | 23.7 kilometres (14.7 mi) | 6.7% | Galt subdivision purchased from CPR between West Toronto Diamond and Union Station. | ||||
| Bradford | 1999-04-30 | 33.2 kilometres (20.6 mi) | 9.5% | Newmarket subdivision purchased from CN north of East Gwillimbury. | ||||
| USRC | 2000-06-07 | 52.1 kilometres (32.4 mi) | 14.8% | Union Station Rail Corridor purchased from Toronto Terminals Railway. | ||||
| Stouffville | 2001 | 84.2 kilometres (52.3 mi) | 24.0% | Uxbridge subdivision purchased from CN (Scarborough - Uxbridge). | ||||
| Bradford | 2001-01-07 | 50 | Rutherford opened. | |||||
| 2002-01-16 | 122.0 kilometres (75.8 mi) | 34.7% | Newmarket subdivision purchased from CN between East Gwillimbury and Davenport Diamond. | |||||
| Stouffville | 2002-09-03 | 51 | Centennial opened. | |||||
| Bradford | 2002-09-06 | 52 | York University opened. | |||||
| Stouffville | 2002-12-02 | 53 | Mount Joy opened. | |||||
| Bradford | 2004-11-01 | 54 | East Gwillimbury opened. | |||||
| Georgetown | 2005-02-07 | 55 | Mount Pleasant opened. | |||||
| Stouffville | 2005-06-02 | 56 | Kennedy opened. | |||||
| Milton | 2007-09-04 | 57 | Lisgar opened. | |||||
| Barrie | 2007-12-17 | 58 | 380.5 kilometres (236.4 mi) | 150.8 kilometres (93.7 mi) | 39.6% | Service extended to Barrie South, line renamed. | ||
| Stouffville | 2008-09-02 | 59 | 383.0 kilometres (238.0 mi) | 153.3 kilometres (95.3 mi) | 40.0% | Service extended to Old Elm (formerly Lincolnville). | ||
| Georgetown | 2009-04-08 | 177.8 kilometres (110.5 mi) | 46.4% | Weston subdivision purchased from CN (Bramalea - Union).[1] | ||||
| Barrie | 2009-12-15 | 193.4 kilometres (120.2 mi) | 50.5% | Remainder of Newmarket subdivision purchased from CN (Davenport Diamond - Union).[2] | ||||
| Lakeshore East Stouffville |
2011-03-30 | 234.0 kilometres (145.4 mi) | 61.1% | Kingston subdivision purchased from CN between Union Station and Pickering.[3] | ||||
| Kitchener | 2011-12-19 | 61 | 437.2 kilometres (271.7 mi) | 53.5% | Service extended to Kitchener. Line renamed. | |||
| Barrie | 2012-01-30 | 62 | 442.9 kilometres (275.2 mi) | 239.7 kilometres (148.9 mi) | 54.1% | Allandale Waterfront opened. | ||
| Lakeshore West Richmond Hill |
2012-03-27 | 300.5 kilometres (186.7 mi) | 67.9% | Oakville subdivision purchased from CN between Union Station and Fourth Line; Bala subdivision purchased from CN between Union Station and Doncaster Diamond.[4] | ||||
| Kitchener | 2013-01-07 | 63 | Acton opened. | |||||
| Lakeshore West | 2013-03-21 | 313.9 kilometres (195.0 mi) | 70.9% | Oakville subdivision purchased from CN between Fourth Line and Brant Street.[5] | ||||
| Kitchener | 2014-09-29 | 367.1 kilometres (228.1 mi) | 82.9% | Guelph subdivision purchased from CN between Kitchener and Georgetown.[6] | ||||
| Lakeshore West | 2015-07-09 | 64 | 446.1 kilometres (277.2 mi) | 82.3% | Service extended to West Harbour. | |||
| Richmond Hill | 2016-12-05 | 65 | 453.6 kilometres (281.9 mi) | 80.9% | Service extended to Gormley. | |||
| Barrie | 2017-12-30 | 66 | Downsview Park opened. | |||||
| Lakeshore West | 2019-01-07 | 68 | 522.5 kilometres (324.7 mi) | 70.3% | Service extended to Niagara Falls. | |||
| Richmond Hill | 2021-06-28 | 69 | 526.1 kilometres (326.9 mi) | 69.8% | Service extended to Bloomington. | |||
| Barrie | 2021-07-19 | 68 | York University station closes. | |||||
This is a table of how GO Transit's network has changed since its creation.
- ^ GO Transit acquires important CN rail line for expanded commuter rail service in the Greater Toronto Area
- ^ Metrolinx acquires full ownership of Toronto-Barrie rail commuter corridor in transaction with CN
- ^ Metrolinx acquires key commuter-rail segment of CN's Kingston Subdivision east of Toronto Union Station
- ^ CN sells Greater Toronto Area rail lines to Metrolinx for GO Transit services
- ^ CN sells Oakville-Burlington, Ont., line segment to Metrolinx for GO Transit commuter rail service
- ^ CN sells Georgetown-Kitchener, Ont., rail line to Metrolinx for GO Transit commuter rail service