Ottawa set to open expanded Trillium rail line

Ottawa set to open expanded Trillium rail line

By Trains Staff | January 3, 2025

| Last updated on August 6, 2025


Extended route, airport spur set to begin operating Jan. 6, more than two years behind schedule

Red and white DMU trainset outside shop building
One of the Stadler FLIRT trainsets for Ottawa’s Trillium Line sits outside OC Transpo’s new maintenance facility for its Lines 2 and 4. OC Transpo

Map of extended Ottawa light rail line
The expanded Line of Ottawa’s light rail system covers 19 kilometers, plus a 4-kilometer airport spur. OC Transpo

OTTAWA, Ontario — The phase two extension of Ottawa’s light rail Trillium Line, which includes a connection to the city’s airport, is set to open Monday, Jan. 6, transit agency OC Transpo has announced.

The addition will open for limited service for at least the first two weeks, operating from 6 a.m. to 12 a.m. Monday through Friday. Existing parallel bus service will continue seven days a week, at least initially.

The extension expands the original 8-kilometer (5-mile), seven-station Line 2 route to 19 kilometers (11.8 miles) and 11 stations, plus a 4-kilometer (2.5-mile) spur to Macdonald-Cartier International Airport known as Line 4. The Trillium Line, which uses diesel-powered equipment, connects with the electrified Confederation line at its northern endpoint, Bayview.

The original route opened in 2001 and was shut down in 2020 for what was supposed to be a two-year expansion project.

Stadler FLIRT trainsets will operate on Line 2, while Alstom LINT equipment that had previously run on the Trillium Line will now operate on Line 4.

More on the start of operations is available here.

 

 

 

 

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