With marijuana use legal in Washington now, there’s been a lot of discussion about how safe it is to drive under the influence of pot. And how long its effects could impact drivers.

According to new research, cannabis can be detected in the blood, at a level that might affect driving, for weeks after the last ‘intake.’

This underlines a point, that while marijuana legalization has been moving rapidly, there’s been very little research done about the effects of daily smoking on driving safety–or on ways that law enforcement might expedite testing.

“The Car Connection” has the details on this latest study.

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