Welcome to OS/OW Online Permitting!

NHDOT Permits will streamline your Oversize/Overweight permitting process. If you are moving a vehicle and/or a load that exceeds legal dimensions or weight, you can apply for your permits online 24 hours a day, 7 days a week, 365 days a year. Some permits will be automatically issued by the permitting system depending on dimensions, weight, routes, and current restrictions.

Permits that cannot be auto-issued will be processed in the order they are received by date and time requested during Monday - Friday between the hours of 8:00 AM - 4:00 PM EST, except holidays. Permit Office: (603) 271-2691 Fax: (603) 271-6084 or nhdotpermits@dot.nh.gov. See New System information in the Documents section.

Important News and Announcements

  • DOS Additional Certification and Registration and NHDOT OSOW Permits
    • Carriers are not allowed to utilize DOS Additional Certification and Registration issued per RSA 266:18-d combined with permits issued by the NHDOT Oversize/Overweight (OS/OW) Permit Office. Single trip permits, Annual Permit Supplemental permits, and Emergency permits are issued by NHDOT OS/OW Permit office for actual weight and dimensions. Any non-divisible load that exceeds the legal weight on an annual permit shall apply for a supplemental permit with the actual weight to assure the route provided can be safely traversed.
  • Password Change Required
    • Change in password is required every 90 days. This a Payment Card Industry (PCI) standard designed to ensure that ALL companies that accept, process, store or transmit credit card information maintain a secure environment.
    • Loads greater than 110 feet in length and/or greater than 13 feet 6 inches in height require a Route Survey. Route Surveys may be required for other conditions as determined by NHDOT. The Route Survey form will be generated by NHDOT Permits based on the load information and route generated by the system. The applicant is required to download the system generated Route Survey form, complete the form by the applicant or a Route Survey company on behalf of the applicant, and upload the Route Survey form with the permit application. Route Surveys will be saved in the system and can be re-used by the same carrier for the same load criteria and route for up to 30 days or less based on changes to transportation infrastructure of restriction conditions.

      Submittal of a completed and signed route survey is an attestation that the route has been surveyed by driving the route provided on the route survey form and the vehicle and load can safely complete the trip including all dimensions provided on the route survey form. Submitted route surveys must include any obstructions, dimensional conflicts, special driving directions including lanes of travel, speeds, and traffic control requirements. Route surveys are part of the information the applicant provides to obtain a permit and are a condition of the permit. The Driver's signature on the permit certifies that all information is accurate and complete. Permits are signed under penalty of unsworn falsification pursuant to New Hampshire RSA 641.3.
    • All construction, maintenance, parade, and annual spring road postings on NHDOT maintained roads are managed within the restriction manager of the new permitting system. Details of restrictions can be obtained by clicking or hovering over the restriction(s) which are shown in red after the route is generated by the system on the routing page.
    • 2020 Holiday Travel Restrictions

      2020 Holiday Travel Restrictions

      January 20, 2020 Martin Luther King Jr. Day

      February 17, 2020 Washington’s Birthday

      May 25, 2020 Memorial Day

      July 3, 2020 Independence Day

      September 7, 2020 Labor Day

      October 12, 2020 Columbus Day

      November 11, 2020 Veteran’s Day

      November 26, 2020 Thanksgiving Day

      November 27, 2020 Day After Thanksgiving

      December 25, 2020 Christmas Day

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         NHDOT Oversize/Overweight Permit Office     
    • PO Box 483 | 7 Hazen Drive, Concord, NH | 03302-0483
    • (603) 271-2691 | (603) 271-6084
    • nhdotpermits@dot.nh.gov

    Copyright 2015. State of New Hampshire