A smaller area of 3,838 square kilometres (1,482 sq mi) is governed by the Montreal Metropolitan Community (MMC) (French: Communauté métropolitaine de Montréal, CMM). This level of government is headed by a president (currently Montreal mayor Denis Coderre).
The inner ring is composed of densely populated municipalities located in close proximity to Downtown Montreal. It includes the entire Island of Montreal, Laval, and the Urban Agglomeration of Longueuil.
The outer ring is composed of low-density municipalities located on the fringe of Metropolitan Montreal. Most of these cities and towns are semi-rural. Specifically, the term off-island suburbs refers to those suburbs that are located on the North Shore of the Mille-Îles River, those on the South Shore that were never included in the megacity of Longueuil, and those on the Vaudreuil-Soulanges Peninsula. Communities in that area are also informally referred to as the 450, after the telephone area code that has served the region since 1998.
The Agence métropolitaine de transport (AMT) (English: Metropolitan Transportation Agency) plans, integrates, and coordinates public transport across Greater Montreal, including the Island of Montreal, Laval (Île Jésus), and communities along both the north shore of the Rivière des Mille-Îles and the south shore of the Saint Lawrence River. Established in 1996, the AMT's commuter rail system has five lines linking the downtown core with communities as far west as Hudson, as far east as Mont-Saint-Hilaire, and as far north as Saint-Jérôme. AMT's mandate also includes the management of reserved High-occupancy vehicle lanes, metropolitan bus terminuses, park-and-ride lots, and a budget of $163 million, which is shared amongst the transit corporations and inter-municipal public transit organizations. The AMT's territory spans 63 municipalities and one native reserve, 13 regional county municipalities, and 21 transit authorities. It serves a population of approximately 3.7 million people who make more than 750,000 trips daily.
The major transit commissions under the Metropolitan Transit Agency are: