Maximum width 102" [8'-6"] and 75' bumper to bumper in Ontario, not counting mirrors...well that's what it was 17 years ago when I was driving.
Sounds about right on width. D.O.T. should have something easy to find. Semi trailers are set to 53' in length but that's with a swivel hitch. Any wider/longer and it becomes a building since you won't be able to make any turns.