| Route 342 | ||||
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| Route information | ||||
| Maintained by Transports Québec | ||||
| Length: | 36.5 km (22.7 mi) | |||
| Major junctions | ||||
| West end: | Chemin Grande Montée in Pointe-Fortune | |||
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| East end: |
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| Location | ||||
| Counties: | Vaudreuil-Soulanges | |||
| Major cities: | Rigaud, Hudson, Vaudreuil-Dorion | |||
| Highway system | ||||
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Route 342 is a provincial highway located in the Montérégie region of Quebec west of Montreal. It runs from the Ontario-Quebec border in Pointe-Fortune (at the junctions of Ontario Highway 417 and Autoroute 40 and ends in Vaudreuil-Dorion at the junction of Autoroute 20. Its main purpose serves a service/alternate route to Autoroute 40 and has 4 interchanges with it in Pointe-Fortune, Rigaud and Hudson.