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Hawaii OSOW Regulations

Permit, escort, and operating-hour requirements for oversize and overweight moves in Hawaii.

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Hawaii OSOW Regulations (HDOT)

  • Width: 8'6"
  • Height: 13'6"
  • Length: 53'
  • Gross vehicle weight: 80,000 lbs

Axle weight limits vary by tread width:

8-foot tread width:

  • Single axle: 42,000 lbs
  • Tandem axle: 56,000 lbs

10-foot tread width:

  • Single axle: 48,000 lbs
  • Tandem axle: 64,000 lbs

Maximum Permitted Dimensions

  • Length: 70 feet maximum
  • Width: 14 feet maximum
  • Weight: Depends on the proposed route

Permit Types and Costs

Single Trip Permit

  • Valid for: One, one-way round trip movement of oversized or overweight vehicles
  • Validity: Specific date, time, vehicle, and route designated in the permit only
  • Cost: Contact district offices for specific fees

Continuous Operation Permit

  • Duration: Not more than one year
  • Maximum dimensions:
    • Width: Less than 12 feet
    • Overall length: 70 feet or less
  • Cost (Less than 1.35 times allowable load): $10

Annual Permits

  • Duration: Valid for 1 year
  • Cost: Contact district offices for specific fees

Note: Excessive loads (in size and/or weight) may require further departmental review which may take up to a minimum of three weeks.

Escort Vehicle Requirements

When Escorts Are Required

Over Width

  • All movements exceeding 12' wide: Escorts required
  • Over 10' wide in mountains or winding coastal areas: Escorts required
  • Over 12' wide: 1 lead escort required
  • Over 14' wide: 2 escorts required

Escort Vehicle Specifications

Vehicle Requirements

  • Passenger car, OR
  • Two-axle truck with rated capacity not exceeding 20,000 lbs gross weight

Communications

  • Two-way radios required
  • Continuous communication between units must be maintained

Lighting

  • At least one rotating or oscillating amber light mounted on top of cab
  • Visibility: Sufficient intensity to be visible at 500 feet in normal sunlight

Signs

For all vehicles over 12' wide:

  • Sign text: "WIDE LOAD"
  • Background: Yellow
  • Letters: Black, 10 inches high
  • Sign dimensions: 6 feet x 1 foot

Operating Times

Peak Hour Restrictions

NO MOVEMENT allowed on state highways during:

  • Morning peak: 5:00 AM - 8:30 AM
  • Afternoon peak: 3:00 PM - 6:00 PM

Allowed travel windows:

  • 8:30 AM to 3:00 PM (daytime window)
  • After 6:00 PM and before 5:00 AM (if specifically permitted)

Contact Information

District Offices:

Oahu:

  • Email: DOT.HWYO.Permits@hawaii.gov
  • Phone: (808) 831-6700 ext. 107

Maui:

  • Email: DOT.HWYM.Permits@hawaii.gov
  • Phone: (808) 873-3535

Hawaii Island:

  • Email: DOT.HWY-H_Permits@hawaii.gov
  • Phone: (808) 933-8866

Kauai:

  • Email: DOT.HWYK.Permits@hawaii.gov
  • Phone: (808) 241-3000

General Contact Information

  • Website: https://hidot.hawaii.gov/highways/
  • State: Hawaii
  • Agency: Hawaii Department of Transportation (HDOT)

Regulatory References

  • Hawaii Department of Transportation
  • Hawaii Administrative Rules (HAR) 19-104
  • HDOT Form DOT-4-005 (Oversize and Over-Weight Permit)
  • https://hidot.hawaii.gov/highways/home/doing-business/guide-to-permits/oversized-and-overweight-vehicles-on-state-highways/
  • https://jjkellercompliancenetwork.com/regsense/oversize-and-overweight-movements-hawaii

Last Updated: 2025-11-11