government agency formed to coordinate all public transportation in the metropolitan Montreal region. Services Fares The Société de transport de Montréal (STM) operates Metro and bus services in Montreal and transfers between the two are free inside a 120-minute time frame after the first validation. As of July 1, 2022, the Autorité régionale de transport métropolitain (ARTM), which is responsible for the distribution of fares in the Greater Montreal area, designated 4 zones within its territory A, B, C and D. The Island of Montreal is within zone A. The city of Laval and the Agglomeration of Longueuil are part of zone B. The northern and southern suburbs of Montreal (off-island) are part of zone C. Zone D territory is not under the authority of the ARTM, but it is still responsible for the distribution of fares there as well. The island of Montreal was placed into zone A and fares for zones B, C and D can be bought separately or together. For example, you can purchase all modes A, all modes AB, all modes ABC or all modes ABCD. There are no all-mode fares for zones B, C, or D. In order to travel to that specific zone, it is necessary to purchase the all modes AB, ABC or ABCD fare even if the destination is zone C. The metro fares are fully integrated with the Exo commuter rail system, which links the Metro to the outer suburbs via six interchange stations (Bonaventure, Lucien-L'Allier, Vendôme, De la Concorde, Sauvé, and Parc) and the under-construction réseau express métropolitain (REM). The fares for Exo, the REM and the Metro for zone A are only valid on the island of Montreal. In order to take the Exo, REM or Metro trains from Montreal to Laval (zone B) or another zone you must have the corresponding fares for that zone. As of February 2022, the STM no longer accepts cash at Metro stations (cash is only accepted for bus fares); only debit and credit cards can be used to purchase tickets. Children between 6 and 17 years old and seniors aged 65+ have access to reduced ticket prices as well as reduced monthly passes. While students age 18 to 25 years old can only purchase a reduced monthly pass with a photo ID Opus card. When a ticket or cash fare is used, a free transfer can be used for trips in