Quebec Autoroute 20

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Autoroute 20
Route Transcanadienne
Autoroute Jean-Lesage Autoroute du Souvenir
A-20 highlighted in red
Route information
Maintained by Transports Québec
Length	641 km[1] (398 mi)
Existed	1964[2]–present
Main section
Length	542.5 km[1] (337.1 mi)
West end	Highway 401 at the Ontario border near Rivière-Beaudette
Major intersections	A-30 in Vaudreuil-Dorion A-13 in Montreal A-15 in Montreal A-10 in Montreal A-25 (TCH) in Longueuil A-30 in Sainte-Julie A-55 in Drummondville A-955 in Sainte-Eulalie A-73 near Quebec City A-85 (TCH) near Rivière-du-Loup
East end	Route Drapeau in L'Isle-Verte
Rimouski section
Length	45.2 km[1] (28.1 mi)
West end	R-132 near Rimouski
East end	R-132 in Mont-Joli
Location
Country	Canada
Province	Quebec
Major cities	Montreal, Longueuil, Brossard, Drummondville, Lévis
Highway system
Trans-Canada Highway Quebec provincial highways Autoroutes List Former
← A-19 → A-25

Autoroute 20 is a Quebec Autoroute, following the Saint Lawrence River through one of the more densely populated parts of Canada, with its central section forming the main route of the Trans-Canada Highway from the A-25 interchange to the A-85 interchange. At 585 km (363.5 mi), it is the longest Autoroute in Quebec. It is one of two main links between Montreal and Quebec City; the other is the A-40.

There are two sections of the A-20, separated by a 57 km (35.4 mi) gap. The main segment extends for 540 km (335.5 mi) from the Ontario border to its current terminus at Trois-Pistoles. The second, more northerly section is far shorter (44 km (27.3 mi)), constructed as a super two autoroute (one lane in each direction), which bypasses Rimouski to the south and ends at a roundabout junction with Highway 132 in Mont-Joli. While the Quebec government has completed environmental and economic reviews of the impact of linking the two sections of Autoroute 20,^[3] it has not committed the funds necessary for construction. Citing the high number of accidents on the Rimouski-Mont-Joli link of the A-20,^[4] many politicians in the Bas-Saint-Laurent region have criticized the government's lack of progress in linking the two sections of autoroute and twinning the two-lane portion.