Missouri
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.
Motorcyclists may ride without helmets if they are 26 yrs or older and have medical insurance.
6 years
70 and over: renewal every 3 years
None
Decriminalized and legal for medical use
None
70
70
60
60
70
70
0.15
90 days
After 0 days with interlock use (restricted); After 30 days (restricted)
Mandatory for repeat convictions
No
Yes
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
At least 80 lbs or taller than 4'9" in booster seat or safety belt
At least 8 yrs and 80 lbs or taller than 4'9"
First 6 months: no more than 1 under 19 Thereafter: no more than 3 under 19
18 years
15
6
40 (10)
16
1 a.m. - 5 a.m.
Secondary; Primary for riders ages 8 through 15
8 and over
8-15 yrs: All (primary enforcement) 16 and over: Front
Yes. Secondary Law. (Effective 8/29/2023)
Yes. Secondary Law. (Effective 8/29/2023)
No
For drivers 21 and under. Primary law.
All drivers. Secondary Law. (Effective 8/29/2023)
Permitted by city ordinance
No state law
Permitted by city ordinance
No state law
Speed, Lack of Seat Belt Use Leading to More Roadway Fatalities
As Drivers Return to the Roadways, Seven States Receive Grants to Stop High Risk Impaired Driving
Missouri lawmakers look to limit cellphones behind the wheel
Strong, enforceable laws are key to curbing distracted driving. As Missouri considers new legislation, Jon Nelson of MODOT discusses the challenges distraction poses in the state.
Missouri lawmakers look to limit cellphones behind the wheel
January 27, 2019
Missouri Buckle Up Phone Down Campaign
The Missouri Department of Transportation (MoDOT) launched the Buckle Up Phone Down (BUPD) challenge in early 2017 to drive down the increasing number of fatalities on Missouri roadways. The challenge focuses on two critical issues every Missourian can help address: unbuckled fatalities and distracted driving crashes. While only 13 percent of Missourians aren't buckling up, nearly two-thirds of people killed in crashes in the state are unbuckled.
Motorcycle Helmet Laws: Missouri
Motorcycle Helmet Required?
Motorcyclists may ride without helmets if they are 26 yrs or older and have medical insurance.
Mature Driver Laws: Missouri
Length of Regular Renewal Cycle
6 years
Drug-Impaired Driving Laws: Missouri
DUID Zero Tolerance or Per se Laws for Some Drugs
None
Speed Limit Laws: Missouri
Rural Interstates: Cars (MPH)
70
Alcohol Impaired Driving Laws: Missouri
Ignition Interlocks
Mandatory for repeat convictions