Montana Department of Transportation

Malcolm “Mack” Long, Director


View the Governor’s Coronavirus Task Force site for more information.

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Diesel Fuel Users: Please be advised that the National and State Covid-19 Emergency Declaration does not include the ability to use non-taxed diesel fuel (dyed diesel) in motor vehicles traveling on public roads and highways. Using dyed diesel on Montana roadways could be result in a penalty not to exceed $1,000.00 for a first offense and $5,000.00 for a second offense.

USDOT Number updates: needed for Intrastate and Interstate carriers, this is a free service that is done by FMCSA and MCS/MDT. You will not receive calls from either entity requesting money to update this for you. If you receive a call from someone offering to do this for you for compensation, this is a scammer. To update your information, please see our FMCSA Page

MCS Content

Welcome Commercial Motor Carriers

We appreciate the significant role our commercial motor carriers play in helping to make Montana roadways safe for all travelers while preserving taxpayer investment in Montana’s highway system. You do this every time you adhere to state and federal commercial motor carrier laws, rules, and regulations.

On this site you’ll find the information you need to keep abreast of the latest news, laws, and regulations. You’ll also find convenient services such as online permitting, road conditions, and more. If there’s something you can’t find, please let us know.

Motor Carrier Services, MDT

Need a DOT number?

Contact FMCSA.

FMCSA Support / Coronavirus Information & Resources

FMCSA has set up a new phone line for support with the FMCSA Portal to better assist motor carriers.

FMCSA Portal Registration Call Center
Monday thru Friday, 8:00 am to 8:00 pm, EDT.

Questions about the Drug and Alcohol Clearinghouse can call or use the contact link.
FMCSA Drug and Alcohol Clearinghouse Help Line
844-955-0207 | Website

FMCSA Coronavirus (COVID-19) Information & Resources

MCS Hiring Information

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