Current law would cover driving while impaired by pot
"New Hampshire wisely chose to say you cannot drive a car impaired by any chemical substance, regardless of ... whether or not a drug is controlled," said Lt. Matthew Shapiro, commander of special services/highway safety for New Hampshire State Police.
"Alcohol is the only chemical compound that has a per se limit because it has a linear and very well-studied progression of impairment," he explained.
If a police officer stops a driver for erratic driving and smells pot, for instance, the officer would look for signs and symptoms of impairment, such as slurred speech, confusion, slowed thought process or staggering gait, Shapiro said.
Even if the individual refuses to submit to such a test, Shapiro said, police can still charge him with DUI based on the "totality of evidence."
There are plenty of legitimate arguments against legalization, he said. But he said fears that police would not be able to arrest impaired drivers shouldn't be one of them.
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