Montana

GHSA maintains data on state laws surrounding a number of highway safety issues. Below is information regarding laws in the state of Montana. For more information, consult the State Highway Safety Office.

Montana
Motorcycle Helmet Required?

Helmets required for riders under 18. Universal helmet law repealed 1977.

Montana
Length of Regular Renewal Cycle

8 years (or 4 years by mail)

Montana
Provisions for Mature Drivers

75 and over: renewal every 4 years

Montana
DUID Zero Tolerance or Per se Laws for Some Drugs

Per se >0 for some drugs

Montana
Marijuana Possession and Use

Legal for medical use

Montana
Marijuana Impaired Driving

THC per se (5 ng)

Montana
Rural Interstates: Cars (MPH)

80

Montana
Rural Interstates: Trucks (MPH)

70

Montana
Urban Interstates: Cars (MPH)

65

Montana
Urban Interstates: Trucks (MPH)

65

Montana
Other Limited Access Roads: Cars (MPH)

Day: 70 Night: 65

Montana
Other Limited Access Roads: Trucks (MPH)

Day: 70 (Light Trucks), 60 (Heavy Trucks) Night: 65 (Light Trucks), 55 (Heavy Trucks)

Montana
Administrative license suspension on first offense

6 months

Montana
Limited driving privileges during suspension

Yes

Montana
Ignition Interlocks

Mandatory for repeat convictions

Montana
Open container laws

Yes

Montana
Repeat Offender Laws

No

Montana
Increased penalty for high BAC

0.16

Montana
Child Restraint Required

Under 6 yrs and under 60 lbs

Montana
Adult Safety Belt Permissible

6 yrs and older and over 60 lbs

Montana
Full Privilege Minimum Age

16 years

Montana
Learner Stage: Minimum Age (Years/Months)

14 / 6

Montana
Learner Stage: Minimum Duration (Months)

6

Montana
Learner Stage: Supervised Driving Hours (Night Hours in Parenthesis)

50 (10)

Montana
Intermediate Stage: Minimum Age (Years/Months)

15

Montana
Intermediate Stage: Nighttime Driving Restriction

11 p.m. - 5 a.m.

Montana
Intermediate Stage: Passenger Restrictions (Except Family, Unless Noted)

First 6 months: no more than 1 under 18 Second 6 months: no more than 3 under 18

Montana
Type of Law

Secondary

Montana
Who is Covered?

6 and over

Montana
In What Seat?

All

Montana
All Cell Phone Ban? School Bus Drivers

No

Montana
All Cell Phone Ban? Novice Drivers

No

Montana
Text Messaging Ban?

No

Montana
Hand-Held Ban?

No

Montana
Speed Cameras: State Law

None

Montana
Speed Cameras: Where Permitted

n/a

Montana
Red Light Cameras: State Law

Prohibited

Montana
Red Light Cameras: Where Permitted

n/a

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