When Uber released a study earlier this year produced with Mothers Against Drunk Driving, taking credit for a decline in drunken driving-related car crashes among drivers under 30, it was called out for not producing enough evidence to make the connection. But now comes a study from researchers at Philadelphia’s Temple University that suggests the entry of Uber’s low-cost ride service, Uber X, into 14 California counties led to a 3.6 to 5.6 percent decline in drunken driving deaths.