['Size and Weight Limits']
['Oversize and Overweight Movements']
07/19/2024
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General requirements
Reducible expectations | Permit issuing authorities will, at their own discretion and upon application and with good cause being shown, issue permits for the movement of vehicles that exceed the legal size and/or weight limitations. | |||
Permit timing | A single trip permit is valid for a one-way load movement made within a three day period. | |||
Method of application | Single trip permits can be obtained from the NDHP permit section, or highway patrol troopers. Applications at the permit section may be made in person, through the mail, or by telephone, on-line at the North Dakota Highway Patrol site, or through J. J. Keller & Associates, Inc., Trip Permits, at (800) 231-5266. | |||
Payments accepted | Payment for permits can be made by providing your account number with a permit service company, an ACH debit account, check, cash, or credit card. Checks are payable to the North Dakota Highway Patrol. | |||
Electronic permits | A legible electronic or paper copy of the permit must be in possession prior to entering North Dakota or starting movement. | |||
Route surveys | Permits must designate the route to be traveled and may contain such other restrictions as deemed necessary by the NDHP or NDDOT engineers. All movements exceeding 18' in height must have written authority from utility companies to travel under overhead wires. Communication cables may be as low as 15' 6", signal lights as low as 16', and flashing signal lights may be as low as 17'. |
Insurance requirements
Liability | An insurance bond in an amount determined by the North Dakota Department of Transportation (DOT) may be required for load or vehicle movements of excessive size or weight, showing the North Dakota DOT as an additional insured. Excessive size and weight will be determined on a case-by-case basis by the North Dakota DOT. | |||
Coverage | Except for mobile homes, there are no special insurance requirements for moving oversize/ overweight loads in North Dakota. Oversize mobile homes require a minimum of $100,000/$300,000/$50,000. |
Available permits and fees
Overdimension | ||
Permit Period | Conditions | Fee |
Single trip | Overwidth vehicle or load that is 14' 6" or less | $20 |
Annual | $150 | |
Single trip | Overlength vehicle that is 120' or less | $20 |
Annual | $150 | |
Single trip | Non-self-issuing interstate permit | $8 |
Annual | $300 | |
Overweight | ||
Permit Period | Conditions | Fee |
Single trip | Overweight self-propelled special mobile equipment | $25 |
Single trip | Overweight self propelled work over rig | $100 |
Single trip | Per ton/per mile fee assessed upon the portion of gross vehicle weight exceeding 200,000 pounds | $0.05 per |
Annual | Work-over service rig | $900 |
Graduated fee for exceeding 150,000 pounds GVW | ||
Single trip | 150,001-160,000 lbs | $30 |
Single trip | 160,001-170,000 lbs | $40 |
Single trip | 170,001-180,000 lbs | $50 |
Single trip | 180,001-190,000 lbs | $60 |
Single trip | 190,001 lbs and over | $70 |
Ton-mile fee for a vehicle or load movement that exceeds the weight limits on highways during the spring thaw or on highways with load limits year round | ||
Axle or Vehicle | Conditions | Fee |
Axle or Vehicle | Exceeding axle weight limits | $1 per |
GVW | Gross vehicle weight exceeds 105,000 lbs and travel is on highways restricted by legal weight or 8-ton and 7-ton designated state highways | $1 per |
GVW | GVW exceeds: • 130,000 lbs on highways restricted by legal weight • 120,000 lbs on 8-ton highways • 110,000 lbs on 7-ton highways • 80,000 lbs on 6-ton highways | $5 per |
Special mobile equipment | Self-propelled special mobile equipment GVW exceeds: • 105,000 lbs on highways restricted by legal weight • 105,000 lbs on 8-ton highways • 105,000 lbs on 7-ton highways • 80,000 lbs on 6-ton highways | $5 per |
Monthly | GVW exceeds 105,000 lbs but does not exceed 129,000 lbs | $100 |
Annual | $700 | |
Overdimension and/or Overweight | ||
Permit Period | Conditions | Fee |
Single trip | Oversize or overweight (up to 150,000 lbs) | $20 |
Special fees | ||
Permit Period | Conditions | Fee |
Any | Engineering fee for those movements that require approval by DOT engineers | $25 |
Any | Per trooper for movements of extraordinary size or weight when an escort by the highway patrol is required | $0.50 per mile or $50 per hour or both |
Permit limitations
General Permit limitations | |
Weight | Limitations |
Annual | Up to 14' 6" (must be non-reducible unless the overall width is 10'or less) |
Configuration | Limitations |
Work-over service rig | Valid only for model year 2010 and older when: • Weight is over 670 per inch of tire width on a single or tandem axle • Over 60,000 pounds on a tridem, or • Over 68,000 pounds on a four-axle group |
Manufactured housing | The maximum permittable overall limits for manufactured housing movements are: • Width: 18' • Height: 15' 6" • Length 120' |
The table below gives the maximum permittable axle weights, except for fixed load equipment mounted on truck-type chassis (such as truck cranes and workover rigs), and self-propelled earthmoving equipment. Single and tandem axle weights may not exceed 600s per inch width of tire; groupings with 3 axles or more may not exceed 550s per inch width of tire.
Tire Size | Single Axle 2 Tires (lbs) | Single Axle 4 Tires (lbs) | Tandem Axle 4 Tires (lbs) | Tandem Axle 8 Tires (lbs) | Triple Axle 12 Tires (lbs) | Four Axle 16 Tires (lbs) |
---|---|---|---|---|---|---|
8:25 | 9,900 | 19,800 | 19,800 | 39,600 | 54,450 | 68,000* |
9:00 | 10,800 | 21,600 | 21,600 | 43,200 | 59,400 | |
10:00 | 12,000 | 24,000* | 24,000 | 45,000* | 60,000* | |
11:00 | 13,200 | 26,400 | ||||
12:00 | 14,400 | 28,800 | ||||
13:00 | 15,600 | 31,200 | ||||
14:00 | 16,800 | 33,600 | ||||
15:00 | 18,000 | 36,000 | ||||
16:50 | 19,800 | 39,600 | ||||
18:00 | 21,600 | 43,200 | ||||
*Maximums include all tolerances. |
For all axle groupings of 4 axles or more, axle weights shall not exceed 19,000s per axle. Except by special permit application, the gross weight of the axle grouping shall not exceed 68,000s, or as determined by the Bridge Load Limitations map.
Axle groupings consisting of 2 sets of tandems or 2 sets of triples spaced 8 feet apart or more are allowed the tandem axle or triple axle weight credit on each axle grouping; however, except by special permit the gross weight of all the axles in the combination may not exceed 68,000s, or as determined by the Bridge Load Limitations map.
The table below lists the maximum permittable axle weights for fixed load equipment mounted on truck-type chassis such as truck cranes and workover rigs. Single and tandem axle weights may not exceed 650s per inch width of tire; groupings with 3 or more axles may not exceed 550s per inch width of tire.
Tire size | Single axle 2 tires (lbs) | Single axle 4 tires (lbs) | Tandem axle 4 tires (lbs) | Tandem axle 8 tire (lbs) | Triple axle 6 tires (lbs) | Triple axle 12 tires (lbs) | Four axle 16 tires (lbs) |
---|---|---|---|---|---|---|---|
8:25 | 10,725 | 21,450 | 21,450 | 42,900 | 27,225 | 54,450 | *68,000 |
9:00 | 11,700 | 23,400 | 23,400 | 46,800 | 29,700 | 59,400 | *68,000 |
10:00 | 13,000 | 26,000 | 26,000 | *50,000 | 33,000 | *60,000 | *68,000 |
11:00 | 14,300 | 28,600 | 28,600 | *50,000 | 36,300 | *60,000 | *68,000 |
12:00 | 15,600 | *30,000 | 31,200 | *50,000 | 39,600 | *60,000 | *68,000 |
13:00 | 16,900 | *30,000 | 33,800 | *50,000 | 42,900 | *60,000 | *68,000 |
14:00 | 18,200 | *30,000 | 36,400 | *50,000 | 46,200 | *60,000 | *68,000 |
15:00 | 19,500 | *30,000 | 39,000 | *50,000 | 49,500 | *60,000 | *68,000 |
16:50 | 21,450 | *30,000 | 42,900 | *50,000 | 54,450 | *60,000 | *68,000 |
18:00 | 23,400 | *30,000 | *46,800 | *50,000 | 59,400 | *60,000 | *68,000 |
*Maximums include all tolerances. |
The following are the maximum permittable axle weights for a workover rig mounted on a truck-type chassis that exceeds 650 lbs per inch-width of tire (single and tandem axle weights may exceed 650 lbs per inch-width of tire but may not exceed 670 lbs per inch-width of tire; see previous table for weight allowed on groupings of three or more axles).
Tire Size | Single Axle 2 Tires (lbs) | Single Axle 4 Tires (lbs) | Tandem Axle 4 Tires (lbs) | Tandem Axle 8 Tires (lbs) |
---|---|---|---|---|
11.00 | 14,750 | 29,500 | 29,500 | 50,000 |
11.20 (285 mm) | 15,000 | 30,000 | 30,000 | 50,000 |
11.60 (295 mm) | 15,550 | 30,000 | 31,100 | 50,000 |
12.00 | 16,100 | 30,000 | 32,175 | 50,000 |
12.40 (315 mm) | 16,625 | 30,000 | 33,250 | 50,000 |
13.00 | 17,425 | 30,000 | 24,850 | 50,000 |
14.00 | 18,775 | 30,000 | 37,525 | 50,000 |
14.40 (365 mm) | 19,300 | 30,000 | 38,600 | 50,000 |
15.00 | 20,100 | 30,000 | 40,200 | 50,000 |
15.20 (385 mm) | 20,375 | 30,000 | 40,750 | 50,000 |
16.50 | 22,125 | 30,000 | 44,225 | 50,000 |
16.70 (425 mm) | 22,400 | 30,000 | 44,775 | 50,000 |
17.50 (445 mm) | 23,450 | 30,000 | 46,800 | 50,000 |
18.00 | 24,125 | 30,000 | 46,800 | 50,000 |
20.50 | 27,475 | 30,000 | 46,800 | 50,000 |
*Maximums include all tolerances |
Signs
General sign requirement | Displayed on the front or roofline of the towing vehicle, and the rear of the vehicle/load when overwidth or when length exceeds 75'. | |||
Escort sign requirement | On roof. | |||
Type | Size | Lettering | Background | |
General signs | OVERSIZE LOAD or LONG LOAD | 5' x 12" | Black at least 8" high with 1" brushstroke | Yellow |
Escort signs | OVERSIZE LOAD | 5' x 12" | Black at least 8" high with 1" brushstroke | Yellow |
Lights
General light requirements | Authorized overwidth movements made at dark require specialized lighting. In lieu of the pilot car requirement for movements not exceeding 16' in width, the overwidth vehicle itself, or vehicle towing or hauling an overwidth load, may be properly lit. | |||
Escort light requirements | Warning lights are required. | |||
Type | Placement | |||
General light type and placement | 1 rotating or 2 flashing amber lights | Mounted above the cab and visible from the front and rear for a distance of at least 500' under clear conditions. If not visible to the rear additional lights are required. | ||
Escort light type and placement | 2 flashing amber lights OR 1 flashing amber light | Mounted on both ends of the sign. Centrally mounted on the top of the sign. |
Flags
Type | Size | Placement | ||
General Flags | Red or bright orange | 18" square | On the traffic side front and rear. When the load extends beyond the bed or body of the vehicle to the rear by 4' or more, the overhang must be marked at the extreme end of the load with a 12” square red flag during the day (lit at night). | |
Escort Flags | NS | NS | NS |
Escort vehicle markings
Size | Placement | Content | |
NS | NS | NS |
Escort/flagperson requirements
Escort vehicles are required as follows:
Load Conditions | Escort Requirements |
---|---|
All movements exceeding 14 ft 6 in. in overall width but not exceeding 16 ft in overall width |
In lieu of the pilot car requirement, the overwidth vehicle itself, or vehicle towing or hauling an overwidth load, may be equipped with a lighted rotating or flashing amber light or lights that are visible from front and rear for a minimum 500 ft. |
All movements exceeding 16 ft in overall width |
|
All movements exceeding 18 ft in overall width | May be required to have a ND Highway Patrol escort as determined by the District Operations Commander |
All movements exceeding 18 ft in overall height | One pilot car or an official escort must precede the movement at a distance of 300 to 700 ft |
All movements exceeding 120 ft in overall length | An approved pilot car or an official escort must follow the movement at a distance of 300 to 700 ft |
All movements of self-propelled earthmoving equipment that exceed legal axle weights | One pilot car follow the movement at a distance of 300 to 700 ft on all highways because of a maximum speed limit of 20 mph ( the Department of Transportation chief engineer, bridge engineer, or district engineer(s) may require one or two pilot cars on other overweight movements that exceed the normal permittable weights) |
Escort car/company requirements
Escort vehicles must be a passenger vehicle or two-axle truck and must meet the requirements of North Dakota Century Code, Title 39. A driver of an escort car must have a valid driver’s license and be 18 years of age of older.
There must be radio communication between the escort car(s) and the vehicle being escorted. When operating in convoy, additional escort cars will not be required provided that each unit in convoy keep at least 1,000 feet apart so as not to hamper passing traffic.
Escort cars not registered in North Dakota will be required to purchase temporary registration when escorting intrastate movements.
Escort car signs, flags, and lights
The vehicle must display an OVERSIZE LOAD sign, 12 inches high by 60 inches long, on the roof. The lettering shall not be less than eight inches high and one-inch brush strokes. In addition, flashing amber lights shall be mounted on both ends of the sign. In place of the two alternating lights, there can be one centrally mounted revolving amber light on the top of the sign.
Travel restrictions
Daytime | Unless authorized no permits for overdimensional movements between 30-minutes after sunset to 30-minutes before sunrise. Permits issued for overdimensional movements of vehicles not exceeding 12' in total width, including load or 126' total length, are valid for travel during the day and night with proper lighting. | |||
Weekend | Unless authorized no permits for overwidth loads exceeding 16' Saturday after noon and all day Sunday. | |||
Holidays | Unless authorized no permits for overwidth loads exceeding 16' on the following holidays: • New Year's Day • Memorial Day • Independence Day • Labor Day, • Thanksgiving • Christmas | |||
Visibility | No movements when inclement weather prevails, highways are slippery, or when visibility is poor. Poor visibility is defined as one-half mile or less. |
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