Green Line (Calgary)

The Green Line, also known as Route 203 is a light rail (LRT) line under construction in Calgary, Alberta, Canada. The line will run between Calgary's north-central and southeastern boundaries, connecting with the Red Line and Blue Line in the city's downtown. The Green Line is the largest public infrastructure project in Calgary's history and will be the first rail line in the city to operate low-floor trains. When completed, the Green Line will comprise 29 stations spanning 46 kilometres (29 mi). This will bring the total number of CTrain stations in Calgary to 74.

Like the Red Line and Blue Line, the Green Line is being constructed in stages. Stage one of construction features 15 stations (9 at-grade, 4 underground, 2 elevated) and is being funded with three roughly equal contributions from the City of Calgary, the Government of Alberta, and the Government of Canada.

Major construction was planned to begin in early 2021 but was delayed to April 2022 after Alberta's United Conservative provincial government failed to contribute the province's pledged portion of the line's funding and rebuked the project as a "line to nowhere", asserting that the City of Calgary did not have "any credible plan" despite nearly four decades of research and planning. This came after months of speculation from city officials, politicians, and journalists that the provincial government and others associated with the United Conservative Party were attempting to stifle or cancel the Green Line despite its popular support.

Due to the provincial government's actions, the City of Calgary temporarily paused the project's procurement though planning, pre-construction and public engagement continued through 2021. Delays persisted until the project received final approval from Alberta's provincial government on July 7, 2021, hours after Prime Minister Justin Trudeau met privately with Jason Kenney in Calgary. This meant the project had full approval from all three orders of government and Prime Minister Justin Trudeau stated "The money is there and the agreements are signed, so regardless of an election, the Green Line is going to go forward."

Construction of the Green Line officially began in April 2022 with PCL Construction selected as the construction management contractor for utility relocation work. The Green Line Board released the Request for Proposals (RFP) to select a proponent to construct phase one of stage one of construction, from Shepard to Eau Claire, on September 26, 2022. Stage one of construction is expected to be completed in 2027.