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
    .15 90 days

    After 0 days with interlock use (restricted)

    After 30 days (restricted)

    Ignition Interlocks

    Mandatory for repeat convictions


    Open Container Laws Repeat Offender Laws
    No 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

  • 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 and legal for medical use
    • Impaired Driving: None
  • Mature Drivers

    Length of Regular Renewal Cycle

    6 years

    Provisions for Mature Drivers

    70 and over: renewal every 3 years

  • Motorcyclists

    Motorcyclists may ride without helmets if they are 26 yrs or older and have medical insurance.

  • Seat Belts

    Type of Law

    Secondary; Primary for riders ages 8 through 15

    Who Is Covered?

    8 and over

    In What Seat?

    8-15 yrs: All (primary enforcement)

    16 and over: Front

  • Speed and Red Light Cameras

    Speed Cameras

    No state law, but permitted by city ordinance.

    Red Light Cameras

    No state law, but permitted by city ordinance.

  • 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)
    70 70
  • 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