I'd prefer to see chronic drunk drivers stop doing so and rely on something like this instead. I suspect the cost of paying for taxis will be less than the cost of all the emergency services, post crash analysis, and road modifications when someone is killed on the road. ( The average cost is 4.3 million per fatality according to the National Safety Council http://blog.safeauto.com/how-much-do-car-accidents-cost-the-... )

[edit for typo fix]