SAN DIEGO — Recreational marijuana use has been legal in California since 2018. But can field sobriety tests identify drivers under the influence of cannabis? A new study by UC San Diego ...

Scientists evaluate how accurate law-enforcement administered field sobriety tests are at measuring cannabis exposure and impairment. Road safety is a critical issue in an era of increasing ...

In one field sobriety test, Hall was told to close her eyes, tilt her head back until she thought 30 seconds had passed — which she did 42 seconds later. Testimony further indicates she failed a ...