If you are suspected of driving while under the influence of drugs, police can require a mouth swab.

The program will begin on Wednesday in Berrien, Delta, Kent, St. Clair and Washtenaw counties. It's a one-year pilot program; drivers who refuse a mouth swab will face a civil infraction.

The counties were chosen based on their numbers of impaired drivers and impaired driving crashes. Crashes caused by drugged drivers increased by 32% from 2015 to 2016.

No doubt that this has a lot to do with the opioid abuse epidemic. We'll see how it pans out.