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 31 km.
A-20 is being extended Eastward to Mont-Joli. 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.
