State Police : (406) 444-3780
OD Permits : (406) 444-7262
Road Conditions : Live Map
Registration maximum weight (cab card) : 138000
Operating time : Loads not exceeding 10' wide, 14'6" high, or 110' in length may travel 24/7 on all routes. Daylight hours (½ hour before sunrise to ½ hour after sunset), including Saturdays and Sundays, is allowed for loads not exceeding 18' wide, 18' high, or 120' in length except on Red Route highways. DW21 and 5 MPH conditions on 2-lane highways only allow daytime travel.
On Red Route Highways, travel is not allowed after 3:00 P.M. Fridays until Sunrise on Saturday, and from 12:00 Noon Sunday to sunrise on Monday if dimensions exceed 10' wide, 14'6" high or 110' in length; and no travel is allowed after 4:00 P.M. Friday until Monday morning if dimensions exceed 18' wide, 18' high, or 120' in length. Red Route Map is available online or at scales. Holiday travel is usually allowed for loads not exceeding 10' wide, 14'6" high or 110' long.
Weights : Weight: * (5 axles) * (6 axles) * (7 axles) *Depends on spacing Single – 24,000, Tandem – 48,000*, Tri Axle– 62,700*, *Variable, dependent on axle spacing. Note: DW21 Conditions: Over approximately 54,300 pounds (depending on axle spacing) on a Tri Axle on 2-lane highways triggers DW21 Conditions, requiring 2 pilot cars. Over approximately 48,000 (depending on axle spacing) on a Tri Axleon 2-lane roads may trigger 5 MPH Conditions which does not require pilot cars but restricts running to daylight only. Loads in excess of these dimensions are considered as superloads .
SEASONAL LOAD (WEIGHT) RESTRICTIONS: Spring thaw restrictions may occur on some routes approximately February through May. Interstate routes are usually not affected.
Size : Width: 18' Height: 17' Length: 150' . Loads in excess of these dimensions are considered as superloads .
Escorts :On Interstate Highways: Width: Over 16'6" – 1 escort Height: Not usually required, but over 17' may depend on route, and over 16' may have 2-lane detours. Length: Over 120' – 1 escort.
On 2-Lane Highways: Width: Over 12'6" – 1 escort, over 16'6 – 2 escorts Height: Over 17' – 1 escort with high pole Length: Over 110' – 1 escort Weight: Over 54,300 – 55,000 on a Tri Axle(varies with spacing) – 2 escorts (DW21 Conditions).
Signs : Vehicle/load exceeding 10' in width require "Oversize Load" signs front and rear, and 5" flashing amber lights, revolving beacon or strobe light(s) are required at each end of the Oversize Load sign on the power unit, or a single beacon light may be used on top of the power unit as long as it is visible from all directions. If the light is blocked by the height/width of the load, the rear of the load should also have a light. "Long Load" sign must be displayed on the rear of combinations exceeding 105' on non-Interstate routes, and exceeding 120' on Interstate routes. Overlength load does not need signs if less than 110' total overall length.
General :Permits valid for three to five days.