Here's a view of a not-really-abandoned bridge, in Chateauguay, QC, along the chemin St-Bernard (St. Bernard road). Images are from Google Earth.
In the 1970's, plenty of highway projects were flourishing in province of Quebec. Among them, there was A-30 extension from south shore of Montreal to Salaberry-de-Valleyfield, then to the US border close to NY-30 at Trout River. The original ROW was along the QC-132, from the A-15, across Candiac, Ste-Catherine and St-Constant, then in Kahnawake First Nation, still along the 132 to Mercier Bridge approaches, then along the 138 to the Blind Lady's Hll Road, connecting to Old Chateauguay Road, then chemin St-Bernard, in Chateauguay, and becoming boulevard de Léry afterwards, (the actual QC-132 in Léry). Some investments were already done when the project was definitely killed, like a double bridge along Chemin St-Bernard, built for the two carriageways of the future A-30. Registered as P-01720, the northwest bridge actually holds a bike path while chemin St-Bernard still use the southeast bridge.

...both bridges from bird's eye view

...the "bike path" bridge, from chemin St-Bernard's one.