Cars and a biker on a multi-lane road. There is also a person walking on the sidewalk.
Traffic Engineering
Yang Tao, Director of Traffic Engineering

THC

Risks of consuming before driving

  • Slows your reaction time
  • Reduces coordination
  • Distorts how your brain processes information
  • Legal issues, injury, or even death

If you plan to use THC

Light green arrow with words in white saying "0 - 35 mg"
Dark green arrow with words in white saying "35 mg + or unsure"
black arrow with words in white saying "Mix with alcohol or other drugs"

If you have 0 - 35mg

Wait at least 6-8 hours before driving

 

If you have 35mg+ or are unsure

Wait much longer that 8 hours before driving, impairment can last for 12+ hours

 

 

If you mix alcohol and any amount of other drugs

Do not drive

 

Driving requires full coordination

Vehicle with front end smashed in from a collision, police lights in the background
  • Create a plan to get home
  • When in doubt, do not operate a vehicle
  • Hand your keys to a trustworthy person who is not drinking
  • If no one is sober, use a rideshare service, like a Taxi, Uber, or Lyft

The Bottom Line

When in doubt, do not operate a vehicle.  The length of impairment varies, by person, dose, and product purity.

Vision Zero Program logo for Madison, WI
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