Enlarge (credit: Uber) Insiders have long viewed Uber as a laggard in the driverless car race, but internal documents obtained by the New York Times suggest that the company's self-driving car program is even further behind its rivals than had been publicly known. The key statistic: prior to last Sunday's fatal crash in Tempe, Arizona, Uber's self-driving cars in Arizona were "struggling" to go 13 miles between interventions by a safety driver—known as a disengagement. In comparison, Waymo's self-driving cars in California traveled 5,600 miles per disengagement in 2017, while Cruise, GM's self-driving car subsidiary, had a disengagement once every 1,250 miles in the state.