Réseau de transport de Longueuil

RTL was officially inaugurated on July 1, 1974, as Commission de transport de la Rive-Sud de Montréal (CTRSM), replacing the former privately owned company Chambly Transport. It served the former communities of Boucherville, Brossard, Greenfield Park, Longueuil, LeMoyne, Saint-Hubert, Saint-Lambert and Notre-Dame-du-Sacré-Cœur (later annexed to Brossard in 1978). From 1985 until 2002 it was named Société de transport de la Rive-Sud de Montréal (STRSM).

Following the municipal mergers in 2002, the name officially changed to Société de transport de Longueuil. Its marketing name is Réseau de transport de Longueuil, to avoid confusion with the Société de transport de Laval.

Some of the "former" municipalities demerged (broke away) from the city of Longueuil on January 1, 2006, as the result of referendums. However, demerged municipalities continue to be served by and to contribute financially to the RTL, since they still belong to the urban agglomeration of Longueuil.

School buses: RTL provides more than 70 school bus lines (numbered in the 500s and 600s) to public high schools in the Centre de services scolaire Marie-Victorin and Riverside School Board systems, as well as a few private secondary schools on the territory. These buses only run once in each direction on school days. More than 8000 pupils use the service.

REM replacement bus service: When the REM trains experience an outage, or during planned maintenance, RTL provides shuttles between Panama, Du Quartier, Brossard stations on its territory, and stations on Nuns' Island and Montreal Central Station. Replacement bus service lines are numbered in the 700s.

Paratransit: Beyond wheelchair-accessible bus lines, registered users with recognized disabilities living in the area can make appointments for point-to-point paratransit. This service is offered to 5000 users.

On-demand transit: RTL operates an RTL à la demande app where riders can create an on-demand transit account and schedule a pick-up and drop-off in four sparser areas of the territory.