"A ban on the sale of alcoholic drinks on Asarnha Bucha day and the first day of Buddhist Lent reduced road fatalities on those days by roughly a half." This is not a cause and effect relationship. More than likely, as with every other holiday in which the sale of alcohol is banned, people stock up on alcohol on the days preceding the holiday. With all this alcohol on hand, people drink so much, that they are too drunk to walk, let alone drive. However, the most likely reason for this statistic, is that they are just plain lying, as they do whenever they want to look like they are doing something useful.