(P) Indicates "as posted." Information is based on latest available data; laws may have changed since press time.
(·) Indicates "yes," item is permitted or required.
(NS) Indicates not specified.
(L) Indicates legislation pending to increase length allowance.
(1) On designated rural interstates; some exceptions.
(2) Required on trailers over 3000 lbs.
(3) Prohibited where posted.
(4) Required on trailers over 3000 lbs. or if gross weight of trailer exceeds empty weight of tow vehicle.
(5) Required on trucks over 3700 kgs.
(6) Required if weight of trailer exceeds 40% of tow-vehicle weight.
(7) Required on trailers over 6000 lbs.
(8) Required if gross weight is over 2500 kgs.
(9) Required on trailers over 1000 lbs. unladen, or 3000 lbs. laden.
(10) Riding in fifth-wheel with audible or visual device with tow vehicle and safety glass.
(11) 24-hour limit.
(12) Required if trailer exceeds 50% of tow-vehicle weight. BC:Laden.
(13) Trailer limited to 48' in a 60' combination.
(14) Eight-hour limit.
(15) Only if required by CSA at time of manufacture.
(16) 8½ ft. on certain federal road systems.
(17) Gross weight requiring brakes.
(18) Must have free access to drive compartment.
(19) Maximum combined length 60 ft. on selected highways. Special permit in Oregon, Wisconsin.
(20) At least one exit must be opened from outside and inside.
(21) Not to exceed 18 hours in any two-week period.
(22) Headlights or daytime running lights required at all times.
(23) 12-hour limit.
(24) Must be able to stop in 40 feet at 20 mph.
(25) On interstate highways; secondary roads still 8 ft.
(26) 8½' on all state routes. On some other roads 8' limits are posted.
(27) Some exceptions or restrictions.
(28) Special wide-body regulations.
(29) Two safety chains or breakaway switch required on trailers.
(30) Required if RV is wider than 2 meters.
(31) Not recommended.
(32) Seats must be equipped with safety belts.
(33) 14 years of age and older.
(34) Required on trailers 3000 lbs. and over
(35) If passenger can communicate with driver, and exit can be opened from both interior and exterior. California: Seat belts required.
(36) Suggested, but not required.
(37) Required on bumper hitches only.
(38) Required if gross weight is more than 1350 kgs.
(39) Headlights must be used when visibility is less than 500 ft. Yukon: always, outside of city.
(40) Total maximum combined length of 75 ft.
(41) Total maximum combined length of 65 ft.
(42) Total maximum combined length of 70 ft.
(43) With certain qualifications. Only with fifth-wheel trailer in Arizona, Illinois, Michigan, Minnesota, Manitoba (maximum length 23m.) and Saskatchewan.
(44) Total maximum length of 72 ft.
(45) See state and provincial regulations.
(46) Total maximum combined length of 80 ft.
(47) Total maximum combined length of 21m.
(48) Total maximum combined length of 23m: ballhitch Ok on fifth wheel only.
(49) Total maximum combined length of 20m.