. It is one of the two main
), and provides important connections to the west and east of the two main cities as well. A-20 is currently 548 km (340 miles) long, making it the longest Autoroute in Quebec.
There are actually two distinct sections of A-20, broken by a gap of 82 km (51 miles) which is intended to be eliminated by
.
. The first section is 517 km (321 miles) long, and is a complete 4 to 6-lane freeway, with two short exceptions:
; several others had existed but were abandoned or grade-separated.
remains a congested 4-lane urban arterial road. The speed limit is 50 km/h (30 mph) in
. It is planned to be upgraded to Autoroute standards, despite the fact that
.
. In
. The original part of the second section was to provide a bypass of
. This section is currently 31 km (19 miles) long; it will be 42 km (26 miles) long after the extension to Mont-Joli is completed, and is currently a
for its entire length.
official plan. Once they are joined up, the length of A-20 will be 641 km (398 miles). It is unclear whether the gap will be filled by a two- or four-lane freeway. No further eastward extensions are currently planned.
.
* On multiplexed sections where another route's numbers are used, the posted exit number is shown followed by the A-20 kilometre post is in brackets
