The former Agence Métropolitaine de Transport (AMT) started service on this line on September 4, 2001 with two round trips every day. One trainset was used for both departures. In September 2003, service was increased to four round trips per day and a second trainset was used. Service was extended to Candiac in 2005, at which point the line was renamed as the Delson-Candiac line. In 2009, two additional departures were added in each direction with leased trainsets being used until new locomotives and rolling stock is received.