So, as I said previously, my first instinct regarding Louis-Colin street was incorrect. The impression that something was off, however, was entirely justified, and I should have noticed earlier. That segment of street which continues past Édouard-Montpetit Bld. does NOT actually connect to Côte-Sainte-Catherine (what can be seen on the other side of the tree thicket is a service alley). Furthermore, the name is incorrect, Northmount Av. is on the other side of Côte-Sainte-Catherine, the segment is merely a continuation of Louis-Colin