The Société de transport de Montréal (STM; ) is a public transport agency that operates transit bus and rapid transit services in the urban agglomeration of Montreal, Quebec, Canada. Established in 1861 as the "Montreal City Passenger Railway Company", it has grown to comprise four subway lines with a total of 68 stations, as well as 212 bus routes and 23 night routes. The STM was created in 2002 to replace the Société de transport de la communauté urbaine de Montréal (STCUM; ). The STM operates the most heavily used urban mass transit system in Canada, and one of the most heavily used rapid transit systems in North America. As of 2019, the average daily ridership is 2,297,600 passengers: 977,400 by bus, 1,306,500 by rapid transit and 13,700 by paratransit service. History Several other public transport companies existed prior to the creation of the STM. From 1861 to 1886, the Montreal City Passenger Railway Company operated a small network of horse-drawn trams (also called streetcars in North America). In 1886, the company changed its name to the Montreal Street Railway Company. The first electric tram appeared in 1892 and was nicknamed "the Rocket". The company underwent another name change in 1893: MSTR became the MTR for Montreal Island Beltline Railway. A year later, the network was fully electrified and in 1894, the last horse-drawn tram was taken out of service. From 1910 to 1911, the company was named Montreal Public Service Corporation before changing again to Montreal Tramways Company. Although they were put into service in 1919, buses only began to be widely used starting in 1925, with the creation of several regular lines. Then in 1937, the first trolley buses were used. In 1939, the company had 929 trams, 224 buses and 7 trolley buses, serving about 200 million passengers per year. The replacement of tram lines by buses began in 1951, when a law was passed by the provincial government that transferred the overall management of transport in Montreal to a public organization, the Commission de transport de Montréal (CTM). The last tram was withdrawn from service in 1959. The Montreal Metro was inaugurated in 1966 and the same year saw the end of trolley bus service. The CTM became the Commission de transport de la communauté urbaine de Montréal (CTCUM) in January 1970, and in 1985, rebranded itself again, becoming the Société de Transport de la Communauté