Montana Department of Transportation

Malcolm “Mack” Long, Director


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

Main Content

Motor Carrier Services

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I-15 Emergency Detour: There will be an emergency detour on north bound I-15 MM 364 near Shelby. detour details

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

Bridge Structure Management System (SMS) will soon transition to a new end user platform. Anticipated go live date is November 15, 2021. Users will need an Okta single sign on account to use the new system. Data on the old system will be available for viewing for a short time, but data will not be updated. Contact the Bridge Management Engineer at 406-444-9219 with any immediate concerns.

MCS Content

Safety & Regulations

MDT's Motor Carrier Services Division protects taxpayer investment in Montana's highway system and ensures the safety of the traveling public through uniform regulation of the commercial motor carrier industry and enforcement of all state and federal commercial motor carrier laws, rules, and regulations.

Motor Carrier Services (MCS) is also responsible for the State of Montana's oversize/overweight permit program. MCS administers all policies and rules governing the issuance of oversize/overweight permits and manages Montana's automated web-based permitting system.

Motor Carrier Safety Assistance Program

The Motor Carrier Safety Assistance Program (MCSAP) is a federal grant program that provides financial assistance to states to reduce the number and severity of crashes and hazardous materials incidents involving commercial motor vehicles (CMV).

The goal of the MCSAP is to reduce CMV-involved crashes, fatalities, and injuries through consistent, uniform, and effective CMV safety programs.

Investing grant monies in appropriate safety programs increases the likelihood that safety defects, driver deficiencies, and unsafe motor carrier practices are detected and corrected before they become contributing factors to crashes.

Related Links

Voluntary Inspection Program

This program is voluntary and was created to allow Montana based carriers to be randomly inspected at their place of business in a setting other than those conducted roadside. Click on the Voluntary Inspection Program link for further information.

Electronic Logging Devices

An Electronic Logging Device (ELD) is an electronic device designed to comply with FMCSA's criteria to accurately record a drivers' driving time for Hours of Service compliance. The International Registration Plan (IRP) and the International Fuel Tax Agreement (IFTA) each allow the use of electronic devices to document vehicle distance by jurisdiction provided the required supporting data are maintained for audit purposes.

Visit the links below for further information:

Be sure to view the Drivers and Carriers; Manufacturers, and Enforcement Partners section on the FMCSA web site.

This will guide you further on finding a compliant ELD, Timeline, FAQ’s, and much more.