there's plenty of literature proving that individual drivers are worse when they're high. check ramaekers' publications. maybe you can hypothesize some weird s

there's plenty of literature proving that individual drivers are worse when they're high. check ramaekers' publications. maybe you can hypothesize some weird situation where individual drivers are worse, but overall traffic is unaffected. but individual users should still want to avoid driving high, as lower overall traffic deaths will not make you feel better about accidentally killing someone.