Canada Post released 10 stamps – in the shape of a maple leaf - for the 150th year since Confederation. The stamps are existing perforated/gummed and self-adhesive/die-cut.
The fifth stamp celebrates the Trans-Canada Highway, which passes through all of the country's provinces.
The image shows a Trans Canada Highway sign east of Canadian Rockies in Alberta province. It is a view towards west, exactly viewpoint is not known (Canada unknown).
The original photograph you can see on the on the website of thecanadianencyclopedia.ca (link).