Science Lags Behind Marijuana Impairment Testing

SACRAMENTO (CBS13) — Marijuana and driving sound like a bad idea, but it’s up to the California Highway Patrol to determine if someone is impaired behind the wheel.
“We want to remove anyone who’s impaired by any substance from the roadways to keep California safe,” said Glen Glaser with the CHP.
The tactics and strategies used by law enforcement to spot impairment are up for debate while science and technology catch up. CHP officers currently use Drug Recognition E