
Warning – New Roadside Drug Tests Could Be Coming to Michigan
Heads up, Michigan. A new bill could give police the go-ahead to swab your mouth during traffic stops to screen for drugs, just like 32 other states already do.
The Michigan House just passed legislation that would allow cops to use saliva-based drug tests during traffic stops. Think of it like a roadside swab, kind of like a breathalyzer but for drugs.
The move will obviously stir up some mixed reactions. Some people are all about it, while others aren’t too thrilled about cops swabbing drivers on the spot. Honestly, I can totally understand both sides.
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What is a Roadside Drug Test and What Does It Test For?
Basically, roadside drug tests are quick mouth swabs that police can use to check if you’ve got certain drugs in your system. They look for stuff like cocaine, meth, opioids, some prescription meds, and yep, THC. The test gives cops a fast heads-up before they send a sample off to a lab to double-check.

One reason some people are skeptical about roadside drug tests, especially when it comes to THC, is that THC can show up in your saliva long after the high wears off. So, just because the test picks it up does not mean someone is actually impaired at that moment. According to Healthline, THC may be detected in blood or saliva 2–24 hours after use.
When Will Michigan’s Roadside Drug Testing Go Into Effect?
The Michigan House passed the bill, but it still needs to get through the Senate and be signed by the governor. If that happens, the new law would take effect 90 days later. So, we’re not there yet, but it’s definitely in motion.
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Gallery Credit: Katelyn Leboff