The Montreal Metro (Métro de Montréal) is a rubber-tired underground rapid transit system serving Greater Montreal, Quebec, Canada. The Metro, operated by the Société de transport de Montréal (STM), was inaugurated on October 14, 1966, during the tenure of Mayor Jean Drapeau.
It has expanded since its opening from 22 stations on two lines to 68 stations on four lines totalling in length, serving the north, east and centre of the Island of Montreal with connections to Longueuil, via the Yellow Line, and Laval, via the Orange Line.
The Montreal Metro is Canada's busiest rapid transit system, delivering an average of daily unlinked passenger trips per weekday as of . It is North America's third busiest rapid transit system, behind the New York City Subway and the Mexico City Metro. In , trips on the Metro were completed. With the Metro and the newer driverless, steel-wheeled REM, Montreal has built one of North America's largest urban rapid transit systems, attracting the second-highest ridership per capita behind New York City. Announcements for the Montreal Metro are pre-recorded and voiced by actress Michèle Deslauriers.
Urban transit began in Montreal in 1861 when a line of horse-drawn cars started to operate on Craig (now St-Antoine) and Notre-Dame streets. Eventually, as the city grew, a comprehensive network of streetcar lines provided service almost everywhere. But urban congestion started to take its toll on streetcar punctuality, so the idea of an underground system was soon considered.
In 1902, as European and American cities were inaugurating their first subway systems, the federal government created the Montreal Subway Company to promote the idea in Canada.
Starting in 1910, many proposals were tabled but the Montreal Metro would prove to be an elusive goal. First, the Montreal Street Railway Company, the Montreal Central Terminal Company and the Montreal Underground and Elevated Railway Company undertook fruitless negotiations with the city.