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Michigan: Just say NO to faulty roadside tests!

Jun 02, 2025

impaired driving, Michigan


Michigan: Just say NO to faulty roadside tests!

The Michigan Legislature is considering HB4390 and HB4391, which would allow law enforcement to administer roadside oral fluid tests and arrest people solely for a positive test. This would ensnare completely unimpaired drivers, well after they last consumed cannabis. 
 
If you live in Michigan, tell your legislators that oral fluid tests are NOT an indicator of impaired driving!
 
A recent meta-analysis assessing the reliability of oral fluid testing concluded: “[Oral fluid] tests should not be considered a valid indicator of [cannabis-induced] impairment.” The study found positive readings for cannabis up to 24 hours after consumption, well past the time period when a consumer is impaired. We would like to thank our friends at NORML for sharing and summarizing the study.