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

  • Alcohol Impaired Driving


    Increased Penalty for High BAC Administrative License Suspension on First Offense Limited Driving Privileges During Suspension Vehicle and License Plate Sanctions
    .15 90 days

    After 0 days with interlock use (restricted)

    After 30 days (restricted)

    Vehicle forgeiture or impoundment (cities with 100,000+ allowed to enact ordinance)

    Ignition Interlocks

    Mandatory for repeat convictions


    Open Container Laws Repeat Offender Laws Alcohol Exclusion Laws Limiting Treatment
    No Yes Yes


  • Child Passenger Safety

    Child Restraint Required

    Under 4 yrs or under 40 lbs in child safety seat

    4-7 yrs and 40-80 lbs and 4'9" or shorter in child safety seat or booster seat

    4 yrs or over and 80 lbs or over or taller than 4'9" in booster seat or safety belt

    Adult Safety Belt Permissible

    8-16 yrs

    4 yrs and over and over 80 lbs or over 4'9" tall

    Maximum Fine for 1st Offense


    $10 for over 80 lbs or over 4'9" tall

  • Distracted Driving

    Hand-Held Ban?


    All Cell Phone Ban?

    School Bus Drivers


    Novice Drivers


    Text Messaging Ban?

    For drivers 21 and under. Primary law.

  • Drug Impaired Driving

    DUID Zero Tolerance or Per se Laws for Some Drugs

    • None

    Marijuana-Specific Laws

    • Possession and Use: Decriminalized
    • Impaired Driving: None
  • Mature Drivers

    Length of Regular Renewal Cycle

    6 years

    Provisions for Mature Drivers

    70 and over: renewal every 3 years

  • Motorcyclists

    Universal helmet law enacted 1967.

  • Seat Belts

    Type of Law

    Secondary; Primary for riders ages 8 through 15

    Who Is Covered?

    Riders 8 and over

    In What Seat?

    Riders 8-15: All

    Riders 16 and over: Front

    Maximum Fine for 1st Offense

    Riders 8-15: $50

    Riders 16 and over: $10 (driver and passenger)

  • Sobriety Checkpoints

    Checkpoints are authorized by law and their legality is upheld under state and federal Constitution. However, the state budget prohibits funds from being spent on them.

  • Speed and Red Light Cameras

    Speed Cameras

    No state law, but programs operating under Missouri DOT policy.

    Red Light Cameras

    No state law, but programs operating under Missouri DOT policy on state maintained roadways. Local municipalities may be operating under their own policies.

  • Speeding and Aggressive Driving

    Rural Interstates

    Cars (MPH) Trucks (MPH)
    70 70

    Urban Interstates

    Cars (MPH) Trucks (MPH)
    60 60

    Other Limited Access Roads

    Cars (MPH) Trucks (MPH)
    65 65
  • Teen and Novice Drivers

    Full Privilege Minimum Age

    18 years

    Learner Stage

    Minimum Age (Years/Months)

    Minimum Duration (Months)

    Required Supervised Driving Hours (Night Hours)

    15 6 40 (10)

    Intermediate Stage

    Minimum Age (Years/Months)

    Nighttime Driving Restriction

    Passenger Restriction (except family, unless noted)

    16 1 a.m. - 5 a.m.

    First 6 months: no more than 1 under 19

    Thereafter: no more than 3 under 19

  • Work Zones

    Violations Affected

    Speeding or passing

    Endangerment of a highway worker

    Enhanced Penalties

    Speeding or passing: Additional $250 for 1st offense; additional $300 for subsequent offenses

    Endangerment of a highway worker: Up to $10,000 fine and loss of license

    Workers Must Be Present?


    Signs Must Be Present?