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.

Visual openness, proximity to an exceptional landscape, educational potential, as well as a tourist vocation play a determining role in the choice of sites.

The arrangement of lookouts invites travelers to stop in safe observation places, close to the road, preferably elevated and exposed to the winds to avoid the presence of insects.

On August 25, 2006, the Quebec government announced a 10-year project to connect the two segments by building 425 km of highway along the Lower North Shore.

In 2011, the Quebec government announced an additional $122 million investment for the project over five years as part of the Plan Nord.

[13] However, by 2013 difficulties ensued between the Quebec Ministry of Transport and the Pakatan Corporation, who was previously responsible for managing the funding for this project, leading to the termination of agreement between the two.

[15] In 2024 the province awarded contracts for engineering and construction of the route and bridges for the road segment between Kegaska and La Romaine.