Quebec Autoroute 31
|Maintained by Transports Québec|
|Length||14.0 km (8.7 mi)|
|South end||A-40 / Route 131 in Lavaltrie|
|North end||Route 131 / Route 158 in Joliette|
|Major cities||Lavaltrie, Joliette|
Autoroute 31 (A-31) is an Autoroute in the region of Lanaudière in Quebec. Constructed in 1966, the A-31 primarily links Joliette with the A-40 and in turn to Montreal, Trois-Rivières, and other points served by Quebec's autoroute system. The A-31 is only 14 km (8.7 mi) long, making it one of the shortest autoroutes in the province. It is multiplexed with Route 131 for its entire length.
The A-31 begins just south of its interchange with A-40 in Lavaltrie. Motorists exiting the A-40 can opt to travel north on A-31 (multiplexed with Route 131) or south on Route 131 to Lavaltrie's city centre. The A-31/A-40 interchange has an unusual configuration, built to accommodate tollbooths (since dismantled). Also unusual for a Quebec autoroute: agricultural vehicles like tractors are permitted to cross over the A-40 by travelling on A-31 from its southern terminus to exit 2. For this reason, an automated traffic regulation system (commissioned in 2009) lowers the speed limit automatically from 100/60 km/h to 90/30 km/h as needed.
Exits at km 2 and km 7 provide access to local roads, while a partial interchange at km 12 serves an industrial zone south of Joliette.
The A-31 ends at km 15 at a cloverleaf interchange with Route 158. Plans for Quebec's autoroute system initially called for A-31 to meet the A-50 at this interchange. Anticipating this outcome, Route 158 in the immediate vicinity of the interchange was constructed as a limited-access highway and signed as A-50. Once plans to extend the A-50 east of the A-15 were abandoned in the 1980s, this stretch of highway was redesignated Route 158. A series of deadly accidents on Route 158 prompted a 2014 petition drive to reconstruct the highway to Autoroute standards and return the designation of A-50.
Motorists exiting the A-31 at km 15 may continue on Route 158 west to St-Esprit, Route 158 east to Berthierville, or Route 131 north to Saint-Félix-de-Valois. Past this interchange, A-31 ends and becomes Boulevard Dollard, which continues into downtown Joliette.
|D'Autray||Lavaltrie||0.00||0.00||–||Route 131 south – Lavaltrie||Souterh terminus of concurrency with Route 131|
|0.00||0.00||1||A-40 / Rang Saint-François – Québec, Montréal||Partial at-grade intersection; exit 22 on A-40|
|1.00||0.62||2||Rang Saint-Henri / Rang du Point-du-Jour|
|12||Rue Ernest-Harnois / Rue Nazaire-Laurin||Northbound exit and entrance|
|Joliette||13.00||8.08||14||Route 158 north / Route 131 – Notre-Dame-des-Prairies, Saint-Michel-des-Saints, Berthierville, Saint-Jérôme||Northern terminus of concurrency with Route 131;|
signed as exits 14E (east) and 14O (west)
|14.00||8.70||–||Boulevard Dollard / Rue Calixa-Lavalleé / Rue Joseph-Arthur – Joliette Centre-Ville||Continuation beyond Route 158|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- "Répertoire des autoroutes du Québec" (in French). Transports Québec. Archived from the original on 2010-01-11. Retrieved 2008-02-23.
- Ministère des transports, "Distances routières", page (?), Les Publications du Québec, 2005
- Ferland, Mathieu (24 July 2014). "Une pétition circule pour modifier la route 158". Le Journal de Joliette (in French). Retrieved 18 March 2016.