---
title: North Dakota Oversize & Overweight Permits (OS/OW) | NDDOT Superload | Alpine Truck Service
description: Expedited North Dakota NDDOT oversize permits, Bakken oilfield logistics, I-94/I-29 clearances, and NDHP escorts. 24/7 dispatch desk. Call (918) 607-6547.
image: https://www.alpinetruckservice.com/alpine-third-party-charges.webp
---

# North Dakota Oversize, Overweight & Superload Permitting Services

Comprehensive commercial trucking permits and heavy haul compliance across North Dakota.

## Agency & Permitting Authority
- **Agency**: North Dakota Department of Transportation (NDDOT) / NHP
- **Portal**: NDDOT E-Permits System
- **Regulatory Advisory**: State DOT regulations and permit processing queues are determined by individual state transportation authorities and vary by agency workload. Carriers should verify active route advisories and state requirements prior to movement.

## Legal vs. Routine Permitted Dimensions
- **Legal Width**: 8' 6" | **Max Routine**: 18' 0"
- **Legal Height**: 14' 0" | **Max Routine**: 16' 6"
- **Legal Length**: 53' Semi-Trailer / 75' Overall | **Max Routine**: 120' 0"
- **Legal Gross Weight**: 80,000 lbs (up to 105,500 lbs on state routes with standard Bridge Formula B axle counts) | **Max Routine**: 150,000 lbs
- **Axle Limits**: Single: 20,000 lbs, Tandem: 34,000 lbs, Tridem: 42,000 lbs

## Permitting Scope & Services in North Dakota
- **Routine Oversize (OS) Cab-Cards**: Single-trip authorizations for dimensions exceeding 8' 6" width or 14' 0" height.
- **Overweight (OW) Axle Permits**: Overload cab-cards for heavy machinery and configurations exceeding 80,000 lbs GVW.
- **Multi-Axle Superload Permits**: Specialized filings exceeding Over 150,000, including State DOT and certified partner bridge reviews, route surveys, and police escorts.
- **Annual & Blanket Fleet Permits**: Continuous-operation annual highway authorizations for construction fleets.
- **Temporary Trip & Fuel Permits**: 72-hour IRP vehicle registration and IFTA fuel tax credentials.
- **County, City & Toll Road Clearances**: Municipal authorizations and turnpike clearances.

## Superload Permitting & State Review Protocol
- **Weight Trigger**: Over 150,000 lbs GVW or exceeding North Dakota Bridge Formula limits
- **Width Trigger**: Over 18' 0" wide
- **Height Trigger**: Over 16' 6" high
- **Length Trigger**: Over 120' 0" overall length
- **State & Partner Bridge Review**: North Dakota Department of Transportation (NDDOT) / NHP electronic systems and certified structural engineering partners evaluate axle load distribution across bridge structures upon submission.
- **Route Surveys & Clearances**: Required for extreme heights/widths to verify overhead physical clearances.
- **Utility & Escorts**: Coordinated wire lifts with power utilities and State Police / Highway Patrol escorts.

## Pilot Cars & Escort Vehicle Requirements
- **Front Escort**: Required over 14' 6" wide on two-lane highways; over 16' 0" wide on multi-lane highways
- **Rear Escort**: Required over 16' 0" wide on multi-lane highways or length exceeding 110' 0"
- **Height Pole**: Required over 15' 6" high (front escort with calibrated height pole)
- **Police Escort**: North Dakota Highway Patrol (NDHP) escort required over 18' 0" wide, 18' 0" high, or over 150,000 lbs

## Metro Curfews & Travel Restrictions
- **Curfew Zones**:
  - Fargo Metro (I-94, I-29): 7:00–8:30 AM & 4:30–6:00 PM M-F (loads >12' wide)
  - Bismarck / Mandan (I-94, US-83) during peak commuter hours
- **Travel Rules**: Daylight only (1/2 hour before sunrise to 1/2 hour after sunset), 7 days a week for routine oversize loads. Overweight-only continuous travel allowed with lighting.

## Key Freight Corridors
- I-94 (East-West Cross-State Spine)
- I-29 (North-South Red River Spine to Canada)
- US-2 (Bakken Northern Logistics Spine)
- US-85 (Bakken Energy Arterial)
- US-52
- ND-23

## Frequently Asked Questions
### What is North Dakota's legal height limit?
North Dakota allows 14'0" legal height on state and federal highways without requiring an oversize permit.

### How are Bakken oilfield heavy haul loads permitted in North Dakota?
NDDOT E-Permits issues specific permits for drilling equipment and workover rigs traversing Williston, Watford City, and Dickinson energy corridors.

### What are North Dakota pilot car escort rules?
North Dakota requires 1 escort for loads over 14'6" wide on two-lane roads and over 16' wide on multi-lane highways. Loads over 18' wide require Highway Patrol escorts.

### How fast can Alpine obtain a North Dakota NDDOT permit?
Routine single-trip permits are typically issued in 2–4 business hours through the E-Permits portal. Alpine verifies axle weights and routes upon intake.

## Contact & Direct Dispatch
- **Direct Phone**: (918) 607-6547 (CALL: [918-607-6547](tel:9186076547))
- **Email**: [permits@alpinetruck.com](mailto:permits@alpinetruck.com)
- **Online Intake**: [alpinetruckservice.com/permits/north-dakota](https://www.alpinetruckservice.com/permits/north-dakota)