Is that basically what they tested maybe 20 years ago between the park gates and Canmore? They put some down on the Banff Minewanka overpass as well, but it didn't stick well there.
https://maps.app.goo.gl/4LpGiB7vcC4TTrzX8
Anyway, the real reason is that they are Jewish Space Laser shades. If you have to ask why, you just don't get anything about our world.