Passenger service commences on O-Train Lines 2 and 4, Canada January 8, 2025 | News, North America News The Ottawa-Carleton Regional Transit Commission (OC Transpo) has announced the commencement of operations on O-Train Lines 2 and 4 in the transit network of Ottawa. Line 2 (Trillium Line) spans 19 km... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password