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Autoroute 20
Route Transcanadienne
Autoroute Jean-Lesage Autoroute du Souvenir
A-20 highlighted in red
Route information
Maintained byTransports 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 theOntario border nearRivière-Beaudette
Major intersections	A-30 inVaudreuil-Dorion A-13 inMontreal A-15 in Montreal A-10 in Montreal A-25 (TCH) inLongueuil A-30 inSainte-Julie A-55 inDrummondville A-955 inSainte-Eulalie A-73 nearQuebec City A-85 (TCH) nearRivière-du-Loup
East end	Route Drapeau inNotre-Dame-des-Neiges
Rimouski section
Length	45.2 km[1] (28.1 mi)
West end	R-132 nearRimouski
East end	R-132 inMont-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 aQuebecAutoroute, following theSaint Lawrence River through one of the more densely populated parts ofCanada, with its central section forming the main route of theTrans-Canada Highway from theA-25interchange to theA-85 interchange. At 585 kilometres (364 mi), it is the longest Autoroute in Quebec. It is one of two main links betweenMontreal andQuebec City; the other is theA-40.

There are two sections of the A-20, separated by a 57-kilometre (35.4 mi) gap. The main segment extends for 540 km (335.5 mi) from theOntario border to its current terminus atTrois-Pistoles. The second, more northerly section is far shorter (44 km (27.3 mi)), constructed as asuper two autoroute (one lane in each direction), which bypassesRimouski to the south and ends at a roundabout junction withHighway 132 inMont-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 theBas-Saint-Laurent region have criticized the government's lack of progress in linking the two sections of autoroute and twinning the two-lane portion.

A-20 begins at theOntario-Quebec border nearRivière-Beaudette as the continuation ofOntario Highway 401. The westernmost section of A-20 was named the Autoroute du Souvenir (Remembrance Highway) in 2007 to honour Canadianveterans. Road marker signs on this stretch of the autoroute feature apoppy (a traditionalsymbol of Remembrance in Canada).

At km 29, A-20 crossesA-30 (formerA-540) before becoming an urban boulevard for approximately eight kilometres (km 30 to 38) inVaudreuil-Dorion andL'Île-Perrot. This stretch of highway takes A-20 across theOttawa River. The speed limit is 50 km/h (30 mph) in Vaudreuil-Dorion and 70 km/h (45 mph) in L'Île-Perrot. A-20 once again becomes a limited-access highway at km 38, just before crossing theSainte-Anne-de-Bellevue Canal onto theIsland of Montreal.

A-20 then traverses theWest Island (inFrench,l'Ouest de l'Île) along the north shore ofLac Saint-Louis to an interchange withA-520. Commonly called the Dorval Interchange, this exit is the main access toMontreal's Trudeau International Airport. Further east, A-20 crossesthe A-13 at its southern terminus, and then, at the St. Pierre Interchange,Route 138 west towards theMercier Bridge.

Just west of downtownMontreal, A-20,A-15, andRoute 136 meet at theTurcot Interchange. In 2020, the completion of a major project involving the rebuilding of the Turcot Interchange has shifted the autoroute north between Route 138 and the interchange. From there, A-20 east ismultiplexed with A-15 south on the approach to theSamuel-de-Champlain Bridge.

This region is also the busiest section of the highway, with 145 000 cars on a daily average.^[5]

Multiplexed withA-10 and A-15, all three autoroutes cross theSaint Lawrence River via theSamuel-de-Champlain Bridge toLongueuil. The multiplex splits south of the bridge. The A-20 parallels the south shore of the river through suburban Longueuil. The junction withA-25 affords a direct connection to theLouis Hippolyte Lafontaine Bridge-Tunnel and Montreal's East End. TheTrans-Canada Highway joins A-20 at this junction.

The longest section of A-20 (from its junction with A-25 to its easternmost terminus) is named afterJean Lesage, who served asPremier of Quebec from 1960 to 1966, during theQuiet Revolution. Autoroute Jean-Lesage currently exists as two discontinuous sections separated by about 55 kilometres:

• The main section between the Louis-Hippolyte-Lafontaine Bridge-Tunnel and Trois-Pistoles in theBas-Saint-Laurent region.
• A shorter section that serves as a bypass ofRimouski and extends east to a final terminus atRoute 132 inMont-Joli.

From the junction with A-25, A-20 travels east, away from the St. Lawrence River. At kilometre 98, A-20 intersects A-30 nearBoucherville, crossing theRichelieu River (km 112) just north ofMont-Saint-Hilaire. BypassingSaint-Hyacinthe, A-20 forms a multiplex withRoute 116 for six kilometres between exits 141 and 147. This section of A-20 in Centre-du-Québec is located the furthest from the St. Lawrence River (approximately 45 kilometres). BetweenDrummondville andSainte-Eulalie, A-20 forms a multiplex withA-55 for 37 kilometres.

A-20 continues across theGreat Lakes–St. Lawrence Lowlands and Quebec's agricultural heartland. The autoroute once again parallels the river as it approachesmetropolitan Quebec City. From this point eastward, A-20 is never more than five kilometres from the river. At km 312, A-20 crossesthe A-73, a north–south link betweenSaint-Georges andQuebec City via thePierre Laporte Bridge. While thecontrol city on A-20 is listed as "Québec", the autoroute never enters the city proper. Before departing the region, the freeway bypasses suburbanLévis.

As it continues eastward, A-20 passes the regional centres ofMontmagny andLa Pocatière before approachingRivière-du-Loup and the junction withA-85 at km 499. TheTrans-Canada Highway departs A-20 at this interchange and travels southeast on A-85 towardEdmundston,Fredericton, andMoncton,New Brunswick and theMaritime Provinces. At km 518, the highway becomes asuper two for the remainder of its main section. The eastern end of the main section of the A-20 is located inTrois-Pistoles, approximately 40 kilometres east of Rivière-du-Loup.

The second section of Autoroute Jean-Lesage (km 597 to km 641) connectsRimouski withMont-Joli. It begins at a junction with Route 132 inRimouski, approximately 55 km from the current terminus of A-20's main section. Like its larger counterpart, the Rimouski section of A-20 parallels the St. Lawrence, providing a southern bypass of Rimouski before ending (at another junction with Route 132) at the western approach to Mont-Joli.

This section of the A-20 is currently asingle carriageway with occasionalpassing lanes. It was built to accommodate an eventual expansion to four lanes and most overpasses include the clearance needed to accommodate the additional lanes. The high accident rate along this section of A-20 have prompted many politicians to call for the highway to be expanded to two lanes in each direction.

An electric fence has been installed on both sides of the highway between km 621 and 628 to preventmoose from crossing the road, while at km 624an underpass has been constructed to allow wildlife to pass under the highway safely.

Transports Québec (MTQ) is currently engaged in several projects designed to connect the two segments of A-20.

Long-range plans by the MTQ call for the two sections of A-20 to meet. A 9.8 km section of single carriageway was opened to traffic on December 3, 2011 betweenCacouna andL'Isle-Verte. As part of this project, a few kilometres of the highway near Cacouna was moved 1.5 km to the south and the old roadbed was destroyed. The MTQ timeline for completing the highway to Trois-Pistoles was met; it opened to traffic in November 2015. Overpasses were constructed for the St-Paul, St-Éloi and Drapeau roads.

Regarding the section fromTrois-Pistoles toRimouski, the Quebec government has completed environmental and economic reviews of the impact of linking the two sections of Autoroute 20,^[3] but it has not committed the funds necessary for construction. Frustrated by the long delay in linking the two sections of A-20, in 2013, the Mayor of Rimouski proposed paying for the construction by tolling the autoroute.^[6]

Citing predictions for an increase in ferry traffic to and from theCôte-Nord as a result of the Government of Quebec'sPlan Nord, in 2011 the Mayor ofMatane called for the further extension of A-20 to his city.^[7]

Autoroute 20 serves as the backdrop to the popular 2002 Quebec filmQuébec-Montréal byRicardo Trogi about seven twenty-something travellers driving between the two cities.

TheQuebec French expression "à l'autre bout de la 20" (inEnglish,at the other end of the 20) refers to Montreal when the speaker is in Quebec City, and to Quebec City when one is in Montreal.

OlderAnglophone Montrealers sometimes still refer to the section of the A-20 west of the city as Highway 2-20^[a] (or "The Two and Twenty"), but theRoute 2 designation was dropped in the mid 1970s.

RCM	Location	km	mi	Old exit	New exit	Destinations	Notes
Vaudreuil-Soulanges	Rivière-Beaudette	0.0	0.0		—	Highway 401 west –Cornwall,Toronto	Continuation intoOntario
		0.9	0.56	Rivière-BeaudetteService Centre (eastbound)
		2.5	1.6		2	R-325 toR-338 –Rivière-Beaudette,Saint-Télesphore
	Saint-Zotique	5.3	3.3		6	69e Avenue
		9.2	5.7		9	Saint-Zotique,Saint-Polycarpe,Saint-Télesphore
	Les Coteaux	11.4	7.1		12	Les Coteaux
	Coteau-du-Lac	13.6	8.5		14	R-201 south –Pont Monseigneur-Langlois,Salaberry-de-Valleyfield	West end of R-201concurrency
		16.4	10.2		17	R-201 north –Coteau-du-Lac,Saint-Clet	East end of R-201 concurrency
		18.6	11.6		19	Chemin Saint-Emmanuel
	Les Cèdres	21.5	13.4		22	Chemin Saint-Dominique
		25.0	15.5		26	Saint-Lazare,Les Cèdres
	Vaudreuil-Dorion	27.6	17.1		29	A-30 toA-40 –Sorel-Tracy,Ottawa/Gatineau,Montréal, Mirabel Airport	A-30 exit 5
		31.6	19.6		—	R-342 (Route Harwood)	At-grade intersection
		32.7	20.3		—	R-338 (Chemin de Lotbinière)	At-grade intersection
		33.3	20.7		—	Avenue Saint-Henri	At-grade intersection
	Ottawa River	33.7– 34.2	20.9– 21.3	Taschereau Bridge
	Pincourt	34.3	21.3		35	Boulevard Cardinal-Léger –Terrasse-Vaudreuil,Pincourt
		35.3	21.9		—	Boulevard de l'Île	At-grade intersection. Entrance and exit to south only.
	L'Île-Perrot	36.7	22.8		—	Boulevard Don-Quichotte	At-grade intersection
		37.2	23.1		—	Boulevard Perrot	At-grade intersection
		37.8	23.5		38	Chemin de L'Île-Claude, Rue de L'Île-Bellevue	Westbound exit and eastbound entrance
Ottawa River		38.1– 38.4	23.7– 23.9	Galipeault Bridge
Montréal	Sainte-Anne-de-Bellevue	38.5	23.9		39	Sainte-Anne-de-Bellevue
	Baie-D'Urfé	41.3	25.7		42	Rue Morgan
	Beaconsfield	43.8	27.2		45	Avenue Woodland
		47.2	29.3		48	Boulevard Saint-Charles
	Pointe-Claire	48.7	30.3		49	Avenue Cartier
		49.9	31.0		50	Boulevard Saint-Jean	Westbound signed as exits 50-S (south) and 50-N (north)
		51.5	32.0		51	Chemin du Bord-du-Lac	Eastbound exit and entrance
		52.6	32.7		53	Boulevard des Sources
	Dorval	53.8	33.4		54	Boulevard Pine Beach, Boulevard Fénelon
		54.9	34.1		56-E	A-520 east / Avenue Dorval –P.E. Trudeau Airport	Westbound signed as exit 56-E (east)
		55.5	34.5		56-O	Boulevard Romeo Vachon,P.E. Trudeau Airport	Westbound exit and eastbound entrance, Westbound signed as exit 56-O (west)
	Montréal	57.5	35.7		58	55e Avenue
		59.3	36.8		60	A-13 north / 32e Avenue –Laval,Mirabel Airport	A-13 exit 1
		61.0	37.9		61	Rue Norman	Westbound exit and entrance
		61.9	38.5		62	1re Avenue, Avenue Saint-Pierre, Avenue Dollard	Westbound exit via exit 63
		62.7	39.0		63	R-138 west –Pont Mercier	West end of R-138 concurrency; R-138 exit 4
		63.9	39.7		65	Rue Saint-Jacques (R-138 east) / Boulevard Angrignon	Eastbound, East end of R-138 concurrency, replaced Exit 64
		65.1	40.5		65	Rue Notre Dame, Boulevard Angrignon	Westbound, replaced Exit 67
		67.3	41.8		68 63	A-15 north (Autoroute Décarie) –Saint-Jérôme R-136 east (Autoroute Ville-Marie) –Montreal Centre-ville	Turcot Interchange; west end of A-15 concurrency; A-15 exit 63; exit numbers follow A-15
		69.4	43.1		62	Boulevard de la Vérendrye, Avenue de l'Église
		70.6	43.9		61	Rue Atwater,Rue Saint-Patrick
		71.8	44.6		60	ToA-10 west / Boulevard Gaétan-Laberge,Rue Wellington –Montreal Centre-ville	A-10 exit 4; eastbound access to A-10 west (unsigned)
		74.0	46.0		58	A-10 west –Montreal Centre-ville,Île des Sœurs	Westbound exit and eastbound entrance; west end of A-10 concurrency; A-10 exit 5
					57	Boulevard deÎle des Sœurs, Chemin de la Pointe Nord	Eastbound exit and westbound entrance; signed as 57-S (south) and 57N (north)
Saint Lawrence River		74.4– 77.2	46.2– 48.0	Champlain Bridge
Longueuil	Brossard	77.6– 79.1	48.2– 49.2		6 75	A-10 east toA-30 /I-89 –Sherbrooke,Québec,Vermont A-15 south /R-132 west toI-87 –La Prairie,New York	East end of A-10 / A-15 concurrency; west end of R-132 concurrency; eastbound signed as exit 6; westbound signed as exit 75; A-10 exit 6; A-15 north exit 53
					75	Boulevard Rome	Westbound exit; accessed from A-15 north / R-132 north exit 52
					—	Boulevard Marie-Victorin	Eastbound exit only
	Saint-Lambert	79.5	49.4	1	76	Boulevard Simard
		80.6	50.1	3	78	R-112 (Boulevard Laurier) –Pont Victoria,Montreal	Westbound signed as exits 78-O (west) and 78-E (east); eastbound access to R-112 west via exit 79
		82.9	51.5	6	79	Avenue Notre-Dame
	Longueuil	84.5	52.5	7	81	Boulevard Lafayette	Eastbound exit and entrance
		85.2	52.9	8	82	R-134 (Boulevard Taschereau) –Pont Jacques-Cartier,Montreal
		88.5	55.0	11	85	Boulevard Roland-Therrien
		92.5	57.5	15 90	89 90	A-25 (TCH) north toA-40 –Tunnel Louis-H.-Lafontaine,Montreal R-132 east –Boucherville,Varennes	Trans-Canada Highway west end (continues on A-25 north); east end of R-132 concurrency; eastbound signed as exits 89-N (north) and 89-E (east); westbound signed as exit 90
		92.7	57.6		90	Boulevard Marie-Victorin
		93.6	58.2		91	Boulevard Industriel, Rue Métropole
	Boucherville	94.3	58.6		92	Boulevard Mortagne
		95.1	59.1		93	Rue Nobel	Eastbound exit only
		98.0	60.9		95	Boulevard de Montarville
		99.0	61.5		98	A-30 toA-10 –Saint-Hubert Airport,Brossard,Sorel-Tracy,Châteauguay,USA	A-30 exit 83
Marguerite-D'Youville	Sainte-Julie	101.5	63.1		102	Sainte-Julie,Saint-Amable,Saint-Bruno-de-Montarville
La Vallée-du-Richelieu	Saint-Mathieu-de-Beloeil	104.8	65.1		105	R-229 –Saint-Basile-le-Grand,McMasterville
		109.1	67.8		109	Rue Saint-Jean-Baptiste –Beloeil,Saint-Mathieu-de-Beloeil
	Beloeil	112.4	69.8		112	R-223 (Rue Richelieu) –Beloeil,Saint-Marc-sur-Richelieu
	Mont-Saint-Hilaire	112.8	70.1		113	R-133 (Chemin des Patriotes) –Mont-Saint-Hilaire,Saint-Jean-sur-Richelieu,Saint-Charles-sur-Richelieu
		115.5	71.8		115	La Grande-Allée –Saint-Jean-Baptiste,Saint-Damase
Les Maskoutains	Sainte-Marie-Madeleine	117.6	73.1	Sainte-Madeleine Rest Stop (eastbound) Hurons Rest Stop (westbound)
	Sainte-Marie-Madeleine-Sainte-Madeleine boundary	119.8	74.4		120	R-227 –Sainte-Madeleine,Saint-Jean-Baptiste
	La Présentation	123.1	76.5		123	Grand Rang –La Présentation,Saint-Hyacinthe
	Saint-Hyacinthe	128.6	79.9		128	Avenue Pinard
		130.6	81.2		130	R-137 /R-235 –Saint-Hyacinthe,Granby,Saint-Denis-sur-Richelieu	Signed as exits 130S (south) and 130N (north)
		130.9	81.3	At-grade railwaylevel crossing
		133.6	83.0		133	Rue Girouard –Saint-Hyacinthe
		134.0	83.3		134	Rue Yamaska –Saint-Hyacinthe
		137.9	85.7		138	R-224 –Saint-Hyacinthe,Saint-Simon
	Saint-Simon	141.7	88.0		141	R-116 west toR-137 south –Saint-Hyacinthe,Granby	West end of R-116 concurrency
		142.5	88.5		143	R-211 toSaint-Valérien-de-Milton
	Saint-Simon–Saint-Liboire boundary	145.0	90.1		145	Saint-Simon,Saint-Liboire
		146.4	91.0		147	R-116 east –Upton,Acton Vale	East end of R-116 concurrency
	Sainte-Hélène-de-Bagot	150.3	93.4		150	Saint-Hugues
		152.4	94.7		152	Sainte-Hélène-de-Bagot
Acton	Saint-Nazaire-d'Acton	156.1	97.0	Saint-Nazaire-d'Acton Rest Stop (westbound)
		156.9	97.5		157	Saint-Nazaire-d'Acton,Wickham
Drummond	Saint-Eugène	160.6	99.8		160	R-239 –Saint-Eugène,Saint-Guillaume
	Saint-Germain-de-Grantham	165.7	103.0		166	10e Rang deSaint-Germain-de-Grantham
		170.3	105.8		170	R-122 –Saint-Germain-de-Grantham,Yamaska,Sorel-Tracy
	Drummondville	173.7	107.9		173	A-55 south toI-91 –Drummondville,Sherbrooke,Vermont	West end of A-55 concurrency; A-55 exit 128
		174.2	108.2		175	R-143 north (Boulevard Lemire) –Saint-Bonaventure,Saint-François-du-Lac	West end of R-143 concurrency
		177.0	110.0		177	R-143 south –Saint-Majorique-de-Grantham,Drummondville	East end of R-143 concurrency
		179.3	111.4		179	Chemin du Golf
		180.8	112.3		181	Drummondville
	Saint-Cyrille-de-Wendover	185.6	115.3		185	R-255 –Baie-du-Febvre,Saint-Cyrille-de-Wendover,Saint-Félix-de-Kingsey
	Notre-Dame-du-Bon-Conseil	191.6	119.1		191	Sainte-Brigitte-des-Saults
		196.5	122.1		196	R-259 –Nicolet,Sainte-Perpétue,Notre-Dame-du-Bon-Conseil, Quebec
		199.8	124.1		200	Saint-Léonard-d'Aston	FormerR-155 north
Nicolet-Yamaska	Saint-Léonard-d'Aston	201.8	125.4		202	Rang du Moulin-Rouge
	Sainte-Eulalie	203.0	126.1		204	Rang des Cédres, Rang des Plaines
		208.0– 211.0	129.2– 131.1		210	A-55 north –Bécancour,Trois-Rivières A-955 south –Victoriaville,Saint-Albert,Warwick R-161 –Sainte-Eulalie,Saint-Valère	East end of A-55 concurrency; A-55 exit 145; A-955 exit 15
		214.7	133.4		215	Rang des Épinettes
Arthabaska	Daveluyville	220.3	136.9		220	R-261 –Bécancour,Daveluyville,Victoriaville
		223.0– 225.0	138.6– 139.8	Daveluyville Rest Stop (eastbound) Lac-à-la-Truite Rest Stop (westbound)
	Saint-Louis-de-Blandford	228.7	142.1		228	R-165 (2e Rang deSaint-Louis-de-Blandford) –Princeville,Plessisville,Thetford Mines
		235.0	146.0		235	R-162 south /R-263 north –Lemieux,Princeville,Victoriaville,Saint-Louis-de-Blandford
Bécancour	Manseau	243.6	151.4		243	R-218 –Manseau,Saint-Pierre-les-Becquets
L'Érable	Villeroy	252.6	157.0		253	R-265 –Villeroy,Plessisville,Deschaillons-sur-Saint-Laurent,Notre-Dame-de-Lourdes,Thetford Mines
		254.0	157.8	L'Érable Rest Stop (eastbound) Villeroy Rest Stop (westbound)
		256.4	159.3		256	15e et 16e Rangs deVilleroy
Lotbinière	Val-Alain	261.7	162.6		261	Val-Alain
		266.5	165.6		266	4e et 5e Rangs deVal-Alain
	Saint-Janvier-de-Joly	271.6	168.8		271	Saint-Janvier-de-Joly
	Laurier-Station	278.1	172.8		278	R-271 –Laurier-Station,Sainte-Croix,Saint-Flavien
	Notre-Dame-du-Sacré-Coeur-d'Issoudun-Saint-Apollinaire boundary	284.8	177.0		285	Notre-Dame-du-Sacré-Cœur-d'Issoudun
	Saint-Apollinaire	290.7	180.6		291	R-273 –Saint-Agapit,Saint-Apollinaire,Saint-Antoine-de-Tilly
		296.3	184.1		296	Route du Cap
Lévis		305.3	189.7		305	R-171 –Lévis,Thetford Mines
		309.0	192.0	Chaudière-Appalaches Service Centre (eastbound)
		311.4	193.5		311	R-116 –Lévis
		312.8– 314.0	194.4– 195.1		312	A-73 toUS 201 –Pont Pierre-Laporte,Québec,Saint-Georges,Maine	Signed as exits 312S (south) and 321N (north); westbound exit is part of 314; A-73 exit 131
					314	R-175 –Pont de Québec,Lévis
		317.9	197.5		318	R-275 – Lévis	Eastbound signed as exits 318-S (south) and 318-N (north)
		321.5	199.8		321	Chemin des Îles
		325.0	201.9		325	R-173 toR-277 –Lac-Etchemin,Lévis	Eastbound signed as exits 325-S (south) and 325-N (north)
		327.5	203.5		327	Route Monseigneur-Bourget
		330.5	205.4		330	Route Lallemand
Bellechasse	Beaumont	337.3	209.6		337	R-279 –Beaumont,Saint-Charles-de-Bellechasse,Saint-Damien-de-Buckland
		341.0	211.9		341	Beaumont,Saint-Charles-de-Bellechasse
	Saint-Michel-de-Bellechasse	344.0– 345.0	213.8– 214.4	La Durantaye Rest Stop (eastbound) Saint-Michel-de-Bellechasse Rest Stop (westbound)
		348.0	216.2		348	R-281 –Saint-Michel-de-Bellechasse,La Durantaye
	Saint-Vallier	355.7	221.0		356	Saint-Vallier,Saint-Raphaël
Montmagny	Berthier-sur-Mer	363.9	226.1		364	Berthier-sur-Mer,Saint-François-de-la-Rivière-du-Sud
	Saint-Pierre-de-la-Rivière-du-Sud	369.3	229.5		369	Saint-Pierre-de-la-Rivière-du-Sud
	Montmagny	375.9	233.6		376	R-228 (Chemin des Poirier) –Montmagny
		377.6	234.6		378	R-283 –Montmagny,Saint-Fabien-de-Panet
	Cap-Saint-Ignace	388.3	241.3		388	Cap-Saint-Ignace
L'Islet	L'Islet	393.0	244.2	Belles-Amours Rest Stop (westbound, seasonal)
		399.9	248.5		400	R-285 –L'Islet
	Saint-Jean-Port-Joli	413.5	256.9		414	R-204 –Saint-Jean-Port-Joli,Saint-Aubert,Saint-Pamphile
	Saint-Roch-des-Aulnaies	430.0	267.2		430	R-132 –Saint-Roch-des-Aulnaies,Sainte-Louise
Kamouraska	La Pocatière	435.8	270.8		436	R-132 (Avenue Industrielle) –La Pocatière
		438.9	272.7		439	La Pocatière
		443.8	275.8		444	R-132 (Avenue de la Grande-Anse) –La Pocatière,Rivière-Ouelle
	Rivière-Ouelle–Saint-Pacôme boundary	449.3	279.2		450	Rivière-Ouelle,Saint-Pacôme,Saint-Gabriel-Lalemant
	Saint-Philippe-de-Néri	455.7	283.2		456	R-287 –Saint-Denis-De La Bouteillerie,Saint-Philippe-de-Néri,Mont-Carmel
		458.0	284.6	Kamouraska Rest Stop (westbound) Monadnocks Rest Stop (eastbound)
	Saint-Pascal	464.4	288.6		465	Kamouraska,Saint-Pascal,Saint-Bruno-de-Kamouraska
	Sainte-Hélène-de-Kamouraska	473.9	294.5		474	Saint-Germain-de-Kamouraska,Sainte-Hélène-de-Kamouraska
	Saint-André-de-Kamouraska	479.9	298.2		480	Saint-André-de-Kamouraska,Saint-Joseph-de-Kamouraska
	Saint-Alexandre-de-Kamouraska	487.5	302.9		488	R-289 toR-230 –Saint-Alexandre-de-Kamouraska,Pohénégamook,Lac-Baker, NB
Rivière-du-Loup	Notre-Dame-du-Portage	495.1	307.6		496	Notre-Dame-du-Portage
		498.0	309.4	Portage Rest Stop (eastbound, seasonal)
		499.3	310.3		499	A-85 (TCH) south toR-185 /Route 2 –Témiscouata-sur-le-Lac,Dégelis,New Brunswick	Trans-Canada Highway east end (continues on A-85 south); eastbound exit and westbound entrance; A-85 exit 100
	Rivière-du-Loup	502.3	312.1		503	R-132 (Rue Fraser) / Boulevard de l'Hôtel-de-Ville
		506.6	314.8		507	R-132 (Boulevard Cartier) –Saint-Siméon
	Cacouna	513.9	319.3		514	R-191 toA-85 –Saint-Arsène,Cacouna,Témiscouata-sur-le-Lac,New Brunswick	Westbound access to A-85
		520.5	323.4		521	Route Moreault
	L'Isle-Verte	527.1	327.5		527	Montée des Coteaux[9]
		531.4	330.2		531	L'Isle-Verte (Rue Notre-Dame),St-Paul-de-la-Croix
		539.1	335.0		539	Saint-Éloi, Route de la Station
Les Basques	Notre-Dame-des-Neiges	542.5	337.1		542	ToR-132 / Route Drapeau –Trois-Pistoles,Rimouski	Current eastern end of main segment
55-kilometre (35 mi) gap in A-20
Rimouski-Neigette	Rimouski	0.0	0.0		—	R-132 –Rivière-du-Loup,Rimouski	At-grade intersection
		9.0	5.6		606	Rue de Lausanne
		13.4	8.3		610	R-232 (Chemin Sainte-Odile) –Rimouski
		17.4	10.8		614	Montée Industrielle-et-Commercialle
	Rimouski-Saint-Anaclet-de-Lessard boundary	24.5	15.2		621	Avenue Père-Nouvel / Rue de la Gare
La Mitis	Sainte-Luce	32.1	19.9		629	R-298 –Sainte-Luce,Saint-Donat,Sainte-Flavie6
	Mont-Joli	45.2	28.1		641	R-132 / Boulevard Jacques-Cartier –Sainte-Flavie,Matane,Amqui,New Brunswick	Eastern terminus;traffic circle
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access       Route transition

Other than the Rivière-Beaudette Rest Area, the remaining rest areas along A-20 are not full service and simple places for motorists and truckers to rest. All (except one) have washrooms and apayphone, A few are seasonal only.

There are 15rest stops located at the following points along Autoroute 20, and contain the following services:

A-20 eastbound

• 
  former 14th Ave. exit, Montréal, 2005
• 
  Merge with 138, Montréal, 2005
• 
  Turcot yards, 2005
• 
  Autoroute 20 eastbound, km 311 near Pierre-Laporte Bridges in Lévis, Québec

A-20 westbound

• 
  Autoroute 20 west, ~km59 on Montreal Island
• 
  Autoroute 20 east, near Rivière Beaudette, ~km 5
• 
  A-30 at A-20 westbound
• 
  Autoroute 20 west, exit 29.

• List of bridges in Montreal
• List of crossings of the Ottawa River
• List of crossings of the Saint Lawrence River

Wikimedia Commons has media related toQuebec Autoroute 20.

• A-20 at motorways-exits.comArchived 2023-03-24 at theWayback Machine
• A-20 at Quebec Autoroutes
• Transports Quebec MapArchived 2008-05-17 at theWayback Machine(in French)
• Veteran from Gaspé behind idea to rename Quebec highway to remember war dead^{[permanent dead link]}
• Autoroute 20 @ Asphaltplanet.caArchived 2011-07-06 at theWayback Machine

Trans-Canada Highway
Previous route Autoroute 25	Autoroute 20	Next route Autoroute 25

• Quebec Autoroutes
• Trans-Canada Highway
• 1964 establishments in Quebec

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