senior annual passes are also available, and eligible post-secondary students enjoy unlimited access to the network through the U-Pass (universal transit pass) program. Route details There are two light rail lines in operation: the Red Line running from the far southern to the far northwestern suburbs of Calgary (Somerset/Bridlewood–Tuscany), and the Blue Line running from the northeastern to the western suburbs (Saddletowne–69 Street). The routes merge and share common tracks on the downtown transit mall on 7th Avenue South, which also allows buses and emergency vehicles. Downtown Transit Mall As part of the construction of the original South leg, nine single-platform stations were built along the 7th Avenue South transit mall, which formed the 7th Avenue free fare zone. All nine stations opened May 25, 1981. The tracks run at grade in a semi-exclusive right of way, shared with buses, city and emergency vehicles. This is a free-fare zone intended to act as a downtown people mover. Fares are only required after trains exit the downtown core. Westbound stations used to consist of Olympic Plaza (formerly 1 Street E, renamed in 1987), 1 Street W, 4 Street W, and 7 Street W. Eastbound stations consisted of 8 Street W, 6 Street W, 3 Street W, Centre Street and City Hall (formerly 2 Street E, renamed in 1987). When the Northeast leg opened on April 27, 1985, two stations were added: 3 Street E serving Westbound Blue Line trains only and 10 Street W, a centre-loading platform, which served as the terminus of both Red and Blue lines, until the Northwest leg opened in 1987, after which it was the terminus for the Blue line only. As part of Calgary's refurbishment project, 3 Street E and Olympic Plaza stations have been decommissioned and replaced by the new gateway City Hall station in 2011. 10 Street W was decommissioned and replaced with the Downtown West–Kerby (formerly called 11 Street W) station in 2012. Downtown station refurbishment In June 2007, the City of Calgary released information on the schedule for the refurbishment of the remaining original downtown stations. The plan involved replacing and relocating most stations, and expanding Centre Street station which was relocated one block east (adjacent to the Telus Convention Centre) in 2000, to board four-car trains. The new stations have retained their existing names (with the exception of 10 Street W becoming Downtown West–Kerby in 2012); however, they may be