https://www.cnet.com/news/uber-self-driving-cars-reportedly-lag-behind-competitors/ >When self-driving car companies test their cars on the open road they measure the vehicles' success and improvement on a number of factors. One such test is how many miles the car can drive autonomously without human intervention. >Uber's driverless cars require human intervention once every 13 miles, according to company documents obtained by The New York Times. This isn't a great rate, compared with Uber's competitors.