It&#x27;s about killing two birds with one stone. Yes, it won&#x27;t solve the problem of alcohol abuse, but it may make a dent in drunk driving (especially if investments in public transportation are also matched with disincentivizing people from driving cars in cities). It would be interesting to find some studies, but I doubt that drunk driving is a common problem in public transportation, because drivers there <i>are at work</i>. They have stronger incentives to behave.