Source: http://www.washingtonpost.com/blogs/wonk...

With a certain logic, quasi-taxi-like services such as Uber and Lyft provide a public health benefit to cities. They give the bar-hopping demographic a better way to get home at night, and, as a result, they may help cut down on DUIs.

Sommer Mathis made a great case for this idea in June at CityLab: "What if the best way to end drunk driving," she asked, "is to end driving?" Traditional cabs have long pushed this thinking, too, smartly selling their services on the inside of bathrooms stalls in popular bars.