The dangerous mix is to blame for 314 fatalities and more than 1,500 injuries already this year. Shaw said he expects those numbers to climb in the coming weeks.

Proposed laws would allow officers to arrest based on saliva test results, but critics cite issues with THC detection and ...

Michigan lawmakers consider roadside saliva tests for drugged driving, but ACLU of Michigan raises concerns about an 11% inaccuracy rate and potential privacy issues.