The CDC recently issued guidance to businesses developing marijuana policies, balancing state legalization efforts and fleet safety. Per the CDC, marijuana should be addressed in motor vehicle safety programs.
Marijuana is a particularly challenging issue as THC can remain at detectable levels long after any intoxicating effect has ceased. Indeed, THC can be detected up to several weeks following consumption. As a result, the CDC reports marijuana being one of the most frequent drugs found in post-crash testing.
The CDC's confirmation of marijuana's specific contribution to crash risk being unclear further complicates this issue. Likewise, a zero-tolerance marijuana policy may no longer be viable under state legalization laws.