I think there are bylaws (different for each city) where the following holds :
(1) dumpster truck can only operate and drive into residential streets @ 7am or something like that, and must be done (construction work stopped ) around sunset.
(2) back alley does not allow dumpster truck...although in Vanc. West side, I've seen quite a few of them illegally doing so in very narrow side or back alley way.
Plse phone your local city hall/bylaw office to find out.