Route 343 | ||||
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| Route information | ||||
| Maintained by Transports Québec | ||||
| Length | 74.4 km[1] (46.2 mi) | |||
| Major junctions | ||||
| North end |  R-347 in Saint-Côme | |||
 R-158 in Joliette  A-40 in L'Assomption | ||||
| South end |  R-138 in Saint-Sulpice | |||
| Location | ||||
| Country | Canada | |||
| Province | Quebec | |||
| Major cities | L'Assomption, Joliette | |||
| Highway system | ||||
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Route 343 is a provincial highway located in the Lanaudière region of Quebec. It runs from Route 138 west of Saint-Sulpice and south of Autoroute 40 and ends at the junction of Route 347 east of Saint-Come and north of Saint-Alphonse-Rodriguez where it has a concurrency with Route 337.
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