Yellow Line (Montreal Metro)

The Yellow Line is a east–west line connecting the Island of Montreal with the South Shore and the city of Longueuil, serving three stations. As with other Montreal Metro lines, the entirety of the line is in tunnel. The line does not have a depot, however a connecting track at Berri–UQAM allows access to both the Green and Orange lines. At the western end of the line, Berri–UQAM station is located below rue Saint-Denis, below the level of the Green and Orange lines. Departing Berri–UQAM, the line heads southeast, with downward gradients of 6% taking the line south under Old Montreal and the Old Port of Montreal. The deepest point of the Metro network is located below rue Notre-Dame in the Old Town. ==History==

Planning and construction In November 1961, Montreal City Council decided to build a Metro network, however the Yellow Line was not part of the original plans. A year later, however, Montreal's bid to host the 1967 World's Fair (Expo 67) was accepted. In early 1963, Executive Chairman of Montreal City Council Lucien Saulnier asked engineers overnight to come up with a proposal to link the city to a potential location for the exposition in the St. Lawrence River. On March 29, 1963, the location for the World's Fair was officially announced, with the under construction Metro to be extended to serve the site. On August 6, 1963, the decision to build the line was approved by Montreal City Council in a special meeting, at an estimated cost of $17 million. In May 1964, tenders were sought to build the line. The previously proposed station on Île Notre-Dame was omitted from the design, with the Expo Express to be built instead. with the Yellow Line built to connect the artificial islands hosting the expo in the St. Lawrence River with downtown Montreal and the rapidly-growing suburb of Longueuil. The tunnels below the St. Lawrence River were dug in bedrock, with open cut construction methods used for the tunnels across the new artificial islands. The artificial islands used spoil from Metro tunnelling to assist in constructing them. The line finally opened to the public on April 28, 1967, the day after the official opening of Expo 67. Following the closure of Expo 67, the line serves the La Ronde amusement park, events at Parc Jean-Drapeau (such as the Canadian Grand Prix) as well as allowing connections to Longueuil and the South Shore. In 1991, the Université de Sherbrooke opened its campus in Longueuil, adjacent to the Metro station. The line is now a key link between the South Shore and Montreal, with 40% of public transit users from the South Shore using the line in the morning peak. Longueuil–Université-de-Sherbrooke is one of the busiest stations on the Metro network. All three stations on the line have been renamed – with Berri-de Montigny renamed to Berri–UQAM in 1988, Île Sainte-Hélène renamed to Jean-Drapeau in 2001, and Longueuil renamed to Longueuil–Université-de-Sherbrooke in 2003. Accessibility In 2019, Jean-Drapeau became the first station on the line to be made accessible. , construction work is underway to make the Yellow Line platforms at Berri–UQAM accessible, despite the technical challenge of excavating and building new elevators below street level. ==Proposed extensions==

South Shore extension In 2009, Premier of Quebec Jean Charest announced $12 million to undertake Metro extension feasibility work. This would include an eastern extension of the Yellow Line, to serve Pierre-Boucher Hospital and CÉGEP Édouard-Montpetit. In December 2011, STM announced their long term extension plans, which included an extension of the line further into Longueuil. The former Agence métropolitaine de transport (now ARTM) published a study, Vision 2020 in December 2011. The study had plans for the Yellow Line to be extended further into the city of Longueuil along Roland-Therrien Boulevard. The six new stations would connect residential areas, shopping centers, and several schools. During the 2010s, Longueuil politicians continued to push for an extension of the Metro further south, while the provincial government and the City of Montreal focused on a proposed extension of the Blue Line to Anjou instead. In 2020, CDPQ Infra (developers of the Réseau express métropolitain) were instructed by the Government of Quebec to develop a public transit plan for South Shore, with the potential of an extension of the Yellow Line. This follows proposals by Réseau de transport de Longueuil and ARTM to build a tramway. In January 2024, CDPQ Infra announced it was withdrawing its proposal to build a line on the South Shore, leaving the local mayors to coordinate with the soon-to-be created provincial government agency for large public transit projects. Northern extension An extension of the Yellow Line further into Longueuil could overload the interchange at Berri–UQAM, with a northern extension of the line proposed as mitigation by offering a connection to the Green Line at McGill. In June 2008, the City of Montreal proposed a number of service improvements and Metro extensions, including extending the Yellow Line from Berri–UQAM to McGill station to ease congestion on that part of the Green Line. In 2018, Québec solidaire proposed a two station extension to McGill, to relieve congestion at Berri–UQAM and connect to the under construction Réseau express métropolitain. == Service ==

Operation hours and frequency The Yellow Line operates between 5:30 a.m. and 1:00 a.m on weekdays and Sunday, and between 5:30 a.m. and 1:30 a.m on Saturday. Trains arrive at stations every 4 to 6 minutes during peak periods, every 4 to 10 minutes during off peak periods, and every 8 to 10 minutes at weekends. Rolling stock trains at Jean-Drapeau Station. At its opening in 1967, MR-63 cars were used on the Yellow Line. Upon the introduction of the MR-73 cars in 1976, they replaced the MR-63 cars on the line. In 2008, MR-63 cars were once again in use on the Yellow Line, but they began to be retired from 2017. The Yellow Line currently uses 9-car long MR-73 trains that can run up to . == List of stations ==