ATTENTION:
FMCSA Registration Modernization Resources Hub: Visit the registration resources-hub for more information.
It is critical that motor carriers, brokers, and other registered entities log in to the FMCSA Portal by May 14, 2026, to ensure their Portal accounts are up to date. Failure to take these steps may result in existing registrants being unable to claim their USDOT Number in Motus once the system goes live. Please read an example of the letter that will be mailed out.
- Log in to their FMCSA Portal account to ensure it is active.
- Verify their Portal Company Official. Learn how.
- Submit an online Biennial Update (MCS-150) in the Portal “Registration” tab.
FMCSA Information Identity Verification
Read about the Clearinghouse change.
Truck Parking (TPAIS)
New Permitting System - see Permits for Commercial Motor Carriers
Payment Types accepted – Change effective on 10/01/2025. Please see the new ePART/PayZang payment structure.
FMCSA TIN/EIN Changes: Inquiries need to be directed to the FMCSA Customer Insurance and Registration Information Support (CIRIS) Contact Center at 1-800-832-5660 or on-line at https://ask.fmcsa.dot.gov/. Requests to make changes must also include updated, signed, and dated MCS-150 from the carrier. Go to the “Send Us a Ticket” section and attach the MCS-150.
Executive Orders from the Office of the Governor: https://governor.mt.gov/executive-orders
USDOT Number updates: needed for Intrastate and Interstate carriers, this is a free service that is done by FMCSA and MCS/MDT. Please be advised to fully vet and use due diligence when using third-party services. For further information, please visit the FMCSA Page. For further questions, contact our MCSAP Section at 406-444-3300.
Structure Failures / Incidents: See this named section to the right for detailed information.
English Language Proficiency Tip Line 406-444-1234 See our MCS Contacts
MDT does not have enough information to say how long any of these restrictions will be in place. Please use alternate routing when applicable. Please visit https://www.511mt.net/ for more information on incidents and closures.
S-482 Farm To Market Rd Libby, MT MP 2.0 to 3.0
Effective 3/17/2026. Road Closed due to flooding.
I-90 EB Bear Canyon MP 313.0 to 313.6
Effective 1/21/2026. All lanes CLOSED. Detour and width limit of 24 feet. Eastbound lanes closed for bridge damage. Detour for eastbound traffic starts at MP 312. Exit 313 Bear Canyon Underpass is closed both directions.
NW Montana Flooding
Effective 12/11/2025. A state of emergency was declared by Governor Greg Gianforte around noon on Thursday, December 11, for Lincoln County due to heavy rains and extensive flooding in the Libby and Troy areas. See information at NW Montana Flooding - Libby, Montana.
Updated road closures and bridge information.
15th Street Bridge over the Missour River in Great Falls, MT
Effective 06/24/2025
No Overweight Loads will be permitted over this bridge until further notice. If you have questions or concerns please feel free to contact MCS at 406-444-7262.
Hwy 91 Big Hole River Bridge 22 Miles N of Dillon
Effective 10/22/2024. Full closure of the Big Hole River Bridge that carries Hwy 91 approximately 22 miles north of Dillon.
Bridge Location
Latitude: 45.526644 and Longitude: - 112.701969
The bridge can no longer carry traffic safely or reliably and will remain closed until further notice.
US-2 Bridge over Kootenai River
Effective 03/07/2024. No overweight loads, loads over legal weight, including permitted loads, are prohibited until further notice from using the US-2 Bridge over Kootenai River at milepost 11.6. The Bridge is approximately 2 miles northwest of Troy, MT.
