Detailed design of Phase 1 has begun, with major construction along 111 Street anticipated to begin in 2025. Phase 1 of the project is a 4.5-kilometre, high-floor LRT extension along the west side of 111 Street and includes: an LRT underpass at 23 Avenue; two bridges (one across Blackmud Creek and one across Anthony Henday Drive); two stations (Twin Brooks station and Heritage Valley North station connecting to the Heritage Valley Transit Centre and Park and Ride); an Operations and Maintenance Facility (south of Anthony Henday Drive); and light rail vehicles.