Quebec Route 138
|Chemin Du Roy|
|Maintained by Transports Québec|
|Length:||1,389.3 km (863.3 mi)|
|West end:||NY 30 at Constable, New York|
| A-30 / Route 132 in Chateauguay
A-20 in Montreal-Ouest
A-15 in Notre-Dame-du-Grace
A-25 in Anjou
A-640 in Repentigny
A-40 in Pointe-du-Lac (Trois-Rivières)
A-40 / A-73 / A-540 in L'Ancienne-Lorette
A-740 / Route 358 in Vanier
A-40 / A-440 / Route 367 in Beauport
A-40 / Route 368 in Boischatel
|East end:||Rue du Moulin in Natashquan (present)
Boul Camille Marcoux in Blanc Sablon to Labrador South Highway (future)
Route 138 is a major highway in the Canadian province of Quebec, following the entire north shore of the Saint Lawrence River past Montreal to the eastern terminus in Natashquan on the Gulf of Saint Lawrence. The western terminus is in Elgin, at the border with New York State south-west of Montreal (connecting with New York State Route 30 at the Trout River Border Crossing). Part of this highway is known as the Chemin du Roy, or King's Highway, which is one of the oldest highways in Canada.
It passes through the Montérégie, Lanaudière, Mauricie, Capitale-Nationale and Côte-Nord regions of Quebec. In Montreal, Highway 138 runs via Sherbrooke Street, crosses the Pierre Le Gardeur Bridge to Charlemagne and remains a four-lane road until exiting Repentigny.
This highway takes a more scenic route than the more direct Autoroute 40 between Montreal and Quebec City. It crosses the Saguenay River via a ferry which travels between Baie-Sainte-Catherine and Tadoussac.
Until the mid-1990s, the highway's eastern terminus was Havre-Saint-Pierre, but in 1996 the extension to Natashquan was completed. A second segment of Route 138 extends from Vieux-Fort to Blanc-Sablon on the eastern end of the Côte-Nord, under the expectation that eventually the two sections of Route 138 will be connected. If the two sections of Route 138 are connected, which would require the construction of river crossings to create a continuous path, before the upgrading of Route 389 to the Labrador border, it would be a vital connecting link to a Newfoundland-Labrador fixed link spanning the Strait of Belle Isle. (At this time, the shortest road link is Route 389 from Baie-Comeau, connecting to the Trans-Labrador Highway to Goose Bay, from near there to Cartwright Junction where it connects to the highway from Cartwright to Blanc-Sablon. Following this route requires several hundred more kilometers of north and south travel through the Canadian wilderness, compared to the direct path a complete Route 138 would provide.)
On August 25, 2006, the Quebec government announced a 10-year project to build 425 kilometres of highway along the north shore, excluding a 40 kilometre gap at a major river crossing, the Natashquan, which will require further study.
Municipalities along Route 138 
See also 
- Ministère des transports, "Distances routières", page 66-69, Les Publications du Québec, 2005
- Trans-Labrador Hwy - Labrador 2003 - Page 5
- "New Quebec highway good for Labrador economy: exporter". CBC News. August 25, 2006. Retrieved 2007-08-17.
- "Extension of Highway 138 between Old Fort and Kegaska".
|Wikimedia Commons has media related to: Quebec Route 138|
- Provincial Route Map (Courtesy of the Quebec Ministry of Transportation) (French)
- Google map for QC 138 from Montreal border to Natashquan
- Google map for QC 138 from Montreal to New York border
- Google map for QC 138 from dead end to Newfoundland and Labrador border