On Deerfoot trail, south of Anderson Rd, there are all these little side ramps that have steel barriers on either end of them. They are short little stretches of road... perhaps 30 to 40 yds long. You particularly see them beside the cement brick wall of the Douglasdale and McKenzie communities.
I always assumed they would be used by the police and/or tow trucks as a place to park and, uh, wait. I can't say I have ever seen them used though, and I spend more time on that stretch of Deerfoot than I care to admit.