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Night moves are restricted to multi-lane controlled access highways with a median. Oversize/overweight moves are allowed holidays, and the preceding day of a statutory holiday, with restrictions. Oversize/overweight moves may operate from ½ hr before sunrise and noon on a statutory holiday for dimensions that do not exceed: width of 3.70 m on two lane highways and 3.85 m on multi-lane highways; length no greater than 25 m for combination vehicles and 12.50 m for single vehicles.
In addition to flags, vehicles and/or loads must display on the front of the vehicle and the rear of the load, in a clearly visible position, a sign visible for a distance of at least 150 m bearing the words "OVERSIZE LOAD" in black letters at least 200 mm high with lines forming the letters at least 30 mm wide on a yellow background, or a "D" sign as illustrated below. When travelling under night moves, the sign shall be made of Level 1, high intensity retro-reflective material (CGSB 62-GP-11M). The sign shall be positioned as to not obstruct lights and other safety devices and removed or covered when not in use.
Vehicles and/or loads in excess of dimensions prescribed under Section 109 of the Highway Traffic Act shall be marked with bright red or orange warning flags of not less than 40 cm square and shall be mounted to the extremities of the vehicle or load. The flag(s) must be kept in good and clean condition so as to not diminish their effectiveness.
Conspicuity requirements must be met during a night move. These requirements are over and above the lighting requirements set out in the HTA and consist of the extremities being marked with a solid amber lamp(s) visible in the front and rear conforming to SAE Code P2 or P3 with markings to appear on lamp(s). When travelling under a night move, a retro-reflective "D" sign described above must be present
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Width: 8 ft 6.37"
Height: 13 ft 6"
Overhang: Front 4 ft, Rear 10 ft
Length: 48 ft (trailer-no overall length limits)
Category 1A: Tridem Drive 23 m (77 ft)
A Train Double 25 m (82 ft)
B Train Double 27.5 m (90 ft)
Single Axle: 7,700 kg (17,000 lb.)
Tandem Axle: 19,100 lkg (35,300 lb.)
Steering Axle: 10,000 kg (22,000 lb.)
Tractor-Trailer Combo - Gross Vehicle : 36,300 kg (80,000 lb.)
A Train 5 axles: 49,000 kg (108,000 lb.)
B Train 8 axles: 63,500 kg (140,000 lb.)