The O-Train is a light-rail transit (LRT) system in Ottawa, Ontario, Canada operated by OC Transpo consisting of three lines and 25 stations. Line 1 is a fully grade-separated electric light rail line and consists of 13 stations, 4 of which are underground. It runs east-west across the city, a distance of approximately from Tunney's Pasture to Blair. Line 2 is a fully grade-separated diesel light rail line and consists of 11 stations. The present line runs north-south on a railway line, from Bayview to Limebank, a distance of approximately and consists of 11 stations. It is isolated from road traffic, but shared with other trains; after operating hours the track has been infrequently used by Ottawa Central for freight service to the National Research Council. Line 4 is a diesel light rail transit branch line splitting from Line 2 at South Keys and runs south to Ottawa MacdonaldâÂÂCartier International Airport, a distance of approximately .
Stage 2 will see the O-Train system expanded south, east, and west, with 24 new stations added to the existing lines.
Stage 2 is a planned extension to the O-Train network which will add an additional 16 stations to Line 1 and 3.