I went hunting for the back of the Royal this lunchtime and came across this alley between Brock and Princess near Clergy. I don't know if it always open as there are gates on both ends but today they were wide open. The last shot is taken back into the alley from Princess.

Later: I think the strange thing for me about these three pictures, with their relative uniformity of colour and the clean numerous lines, is how much they remind me of Counter Strike. Garrity is parked in the window above the archway with the scope. You are already out of the game before you see it is a red truck.