Originally Posted by dmuzika
I was wondering if any knew the history of Hwy 1A through downtown Calgary? I recall seeing on some older maps that Hwy 1A used to follow 16 Ave NW east from Crowchild Trail, go south on 14 St NW, east of 9 Ave S (west on 6 Ave S), and connect with 17 Ave SE which was also Hwy 1A. Right now, the only remnant is an AB 1A shield on EB 14 Ave NW approaching the 14 St NW interchange near SAIT.
Does anyone know when that section would have been decommissioned?
Off the top of my head, I think that a 1A route through downtown would have been abandoned as a highway in the late 1950s, when the Trans-Canada was built along 16th ave.
The map below is from 1926, and shows in red the route you are describing. It used 10th street rather than 14th street north of the river, as the 14th street bridge wasn't built until the mid-1950s.
EDIT: It's entirely possible, probable even, that the 1A remained in use on central roads long after the 1 opened to serve as an alternative... I might look into that.