420 with CNW — Virginia Tech Leverages Novel Way to Study Marijuana Effects on Driving
As more states legalize cannabis, researchers are racing to understand what that shift means for road safety. While laws have changed significantly, scientific evidence on how cannabis influences behavior behind the wheel has lagged. A new study led by the Virginia Tech Transportation Institute seeks to close that gap by tracking drivers in their everyday routines. Over two years, from 2021 through 2023, the research team tracked 105,000 miles driven by adults aged 21 to 70. The trips, 14,700 in total, were recorded using a naturalistic driving approach developed at the institute. About 9,000 miles were logged for marijuana consumption, 1,000 miles reflected alcohol use, while 400 miles included more than one substance use. The remaining trips were substance-free and served as…

















