The Exo Chambly-Richelieu-Carignan sector was formed in 1984 to provide public transit service to the communities of Chambly, Richelieu and Carignan. This area is in southwestern Quebec, Canada, about 25 kilometres (16 mi) east of Montreal on the Richelieu River. In 1993 it was agreed to expand service to St-Mathias-sur-Richelieu, and in 1994 it was the turn of Marieville to join.^[2]

This article needs to be updated. (July 2013)

Gestrans^[3] was contracted to manage the transportation system from 2008 through 2012 with Veolia Transport^[1] (formerly Connex) operating the buses, under an agreement that expired at the end of 2011.^[2]

Most bus routes terminate either at Longueuil or at the downtown Montreal bus terminal via a reserved bus lane on the Champlain Bridge. Both locations provide a connection with local bus services or the Montreal Metro. There are local taxibus routes in Carignan.^[4]

• Exo (public transit) bus services