Politics
Question 8 ads tie legal cannabis to crash risks as Massachusetts vote nears
Supporters of a Massachusetts ballot measure to end recreational marijuana sales are highlighting a claim that 42% of drivers in fatal crashes tested positive for THC. That figure alone does not show that legalization caused crashes or that everyone who tested positive was impaired.
Supporters of Massachusetts Question 8 are using claims about cannabis and driving to argue for ending the state’s legal recreational marijuana market, with voters set to decide the measure Nov. 3.
The campaign has run television ads and projected a message onto a Brookline apartment building stating that 42% of drivers in fatal crashes tested positive for THC, the intoxicating compound in cannabis. Its website also features the phrase “DUIs rising” alongside other statistics.
Question 8 would end legal recreational marijuana sales in Massachusetts. The campaign’s argument is that the current market has made roads more dangerous.
But a positive THC test, by itself, does not establish that a driver was impaired at the time of a crash or that legal sales caused the crash. The campaign’s figures, as presented in its advertisements, do not resolve those questions. Voters weighing the proposal face a consequential public-safety debate in which the distinction between cannabis detection, impairment and causation matters.