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Route 175 with Mont François-De-Laval in the background
Part of Route 175 is built to autoroute standards; the major part of that autoroute portion, also known as Autoroute Laurentienne, overlaps Autoroute 73. However the southern extremity of Autoroute Laurentienne, which is not part of A-73, is also designated as Autoroute 973.[2]
The stretch of highway between Stoneham and Saguenay was considered one of the most dangerous highways in the province due to it being two-lane and subject to poor weather conditions. Collisions, including those with moose, are not uncommon.[3] After lengthy negotiations between the Québec and federal governments to fund the project, work was begun to completely rebuild Route 175 as a four-lane dual carriageway. It was started in 2003 and completed in September 2013.[4]
Halfway between Quebec City and Saguenay is L'Étape, a rest area and campground featuring a gas station, restaurant and dépanneur.
A-973 northern terminus and concurrency; south end of A-73 concurrency; northbound signed as exits 7-E (east) and 7-O (west); southbound signed as exits 148-E (east) and 148-O (west); A-40/ A-73 north exit313; exit numbers follow A-73, while distance markers continue following R-175
