Route 20 is the longest freeway in Québec and is part of the longest continuous freeway in Canada (from Windsor ON to
St. Georges QC) with
Hwy-401. This freeway runs on St. Lawrence Plains on all their length.
R-132 bears A-20 on its freeway part, between
A-10 and
A-25 on Montreal South shore, since A-20 was originally planned to run through Montréal downtown (on the actual
A-720 carriage ), then would have linked with
A-25 via
Souligny Avenue and would have crossed the St. Lawrence via L.-H.-Lafontaine Tunnel-Bridge and joined its actual routing. A-20 runs in the
Southwestern Québec and serves for long distance trips (Montréal-Québec) and trucking. A super-2 freeway (part of A-20) by-passes
Rimouski city on 33 km.
A-20 is being extended Eastward to Mont-Joli. The Luceville-Mont-Joli section is planned to open late 2006. The
first part of this project has been opened to traffic in 1991. The last section should open late 2005. In the Bas-Saint-Laurent
Transportation plan, MTQ planned to connect the two isolated sections of A-20 before 2015.
