Urbaine de Montréal (STCUM). Commuter trains ceased to be the managed by the STCUM in 1996 and responsibility for this service was transferred to the newly created Agence métropolitaine de transport. It was not until 2002, at the time of the merger of Montreal with other municipalities on the Island of Montreal, that the Société de transport de Montreal was created, taking the place of the STCUM. Streetcars From 1861 to 1959, Montreal had an extensive streetcar system. The streetcar network had its beginnings with the horsecar era of the Montreal City Passenger Railway in 1861. That private company would become the Montreal Street Railway in 1886 and the Montreal Tramways Company in 1911. The assets of the company were taken over by the city-owned Montreal Transportation Commission in 1951. Regional transit service The STM was formerly involved in the operation of regional transit services. The first such service was a set of bus routes inherited from the October 1980 expropriation of a private bus company called Metropolitan Provincial (1967) Inc. These regional bus routes operated from downtown Montreal to the western part of the Island of Montreal, as well as to off-island points located west, southwest, and northeast of the Island of Montreal. By the end of 1985, the STM (then known by the initials CTCUM) had exited the regional bus business to focus on its core territory (the Island of Montreal). Most of the regional bus routes were passed to private operators who provided services under contract to newly formed intermunicipal transit councils. The second regional service involved the management of two commuter train lines. On July 1, 1982, the CTCUM and the Canadian National Railway (CN) entered into an agreement to integrate the Montreal-Deux Montagnes commuter train line into the regular CTCUM bus and Metro network. The CTCUM paid CN to staff, run, and maintain the trains, while it set the fares and schedules. Passengers travelling within the CTCUM operating territory were able to transfer between the trains and the bus or Metro, no fare supplement was required to make a bus/Metro to train transfer . On October 1, 1982, a similar agreement with the Canadian Pacific Railway (CP) went into effect, and CP's Montreal-Rigaud commuter train line was integrated into the CTCUM network. On January 1, 1996, responsibility for the commuter trains was transferred to the Agence métropolitaine de transport (AMT) (now RTM), a Quebec provincial