[DownhillGoat]

Originally Posted by undercoverbrother

Really? Do you have a reference for this?

From transportation.alberta.ca:

Can I park on the shoulder of a highway to make a call?

On provincial highways, outside of an urban area, section 43 of the Use of Highway and Rules of the Road Regulation applies and vehicles are not permitted to park on the shoulder of a provincial highway except in an emergency. This is also for safety. If you have to make a phone call, do so at a rest area, or when you stop for gas or for a bathroom break. Alternately, have your passenger make the call.
Provincial highways are typically numbered roadways (e.g., Highway 2), but they may also be known by other names (e.g., Queen Elizabeth II or the Trans-Canada Highway).
Municipal parking bylaws vary from place to place. You will need to consider the parking bylaws for that area before pulling over.