Alcohol Impaired Driving Laws: Wisconsin
Ignition Interlocks
Mandatory for high BAC (.15 or higher) and repeat convictions
GHSA maintains data on state laws surrounding a number of highway safety issues. Below is information regarding laws in the state of Wisconsin. For more information, consult the State Highway Safety Office.
Helmets required for riders under 18 or with instructional permit. Universal helmet law repealed 1978.
8 years
None
Zero tolerance for some drugs
Illegal
Zero tolerance for delta-9-THC
70
70
70
70
70
70
.17, .20 and .25
6-9 months
Yes
Mandatory for high BAC (.15 or higher) and repeat convictions
Yes
yes
Under 1 yr or under 20 lbs in rear-facing child restraint
1-3 yrs and 20-40 lbs must be in either a rear- or forward-facing child restraint
4-7 yrs and 40-80 lbs and under 57" tall must be in either a rear- or forward-facing child restraint or a booster seat
Under 4 years and less than 40 lbs, or if the child is in a rear- or forward-facing child restraint, they mist be in the rear vehicle seat, if available
8 yrs or older or more than 80 lbs or taller than 57"
16 years, 9 months
15 / 6
6
30 (10)
16
Midnight - 5 a.m.
No more than 1
Primary
8 and over
All
No, except in work zones.
No
Drivers with learner or intermediate license. Primary law.
All drivers. Primary law.
Prohibited
n/a
None
n/a
Ignition Interlocks
Mandatory for high BAC (.15 or higher) and repeat convictions
Child Restraint Required
Under 1 yrs or under 20 lbs in rear-facing child restraint
1-3 yrs & 20-40 lbs must be in either a rear- or forward-facing child restraint
4-7 yrs & 40-80 lbs & under 57" tall must be in either rear- or forward-facing child restraint or booster seat
Under 4 years & less than 40 lbs, or if the child is in a rear-or forward-facing child restraint, they must be in a rear seat if available
Full Privilege Minimum Age
16 years, 9 months
Type of Law
Primary
Hand-Held Ban?
No, except in work zones.
Speed Cameras
Prohibited
Red Light Cameras
None
Disobeying a traffic sign or signal
Speeding/Unreasonable and imprudent speed/Too fast for conditions
Reckless driving
Double original fine
Yes
No
To help drivers avoid a drunken driving arrest – or even worse, a serious crash – the Wisconsin Department of Transportation offers a free "Drive Sober" mobile app.