Exo, stylized as exo and officially known as the Réseau de transport métropolitain, is a public transport system in Greater Montreal, including the Island of Montreal, Laval, and communities along both the North Shore of the Mille-Îles River and the South Shore of the St. Lawrence River. It was created on June 1, 2017, taking over Montreal's commuter rail services from the former Agence métropolitaine de transport as well as bus and paratransit services from the various suburban municipal and intermunicipal transit agencies. Exo operates the second busiest such system in Canada after Toronto's GO Transit.