> The commuter dozing in his self-driving car is not aggressively driving, and with his car legally mandated to be in super-safe mode, it's going to take twice

> The commuter dozing in his self-driving car is not aggressively driving, and with his car legally mandated to be in super-safe mode, it's going to take twice as long for it to make it through rush hour traffic. That's a common idea based on not-very-careful observation and just isn't factual. There's plenty of data showing that aggressive driving has minimal effect on travel times. In fact, you actually get a bigger speed-up by strategically avoiding left turns: companies with delivery fleets plan their routes with this in mind. [1] Not-super-technical explanation: http://lifehacker.com/does-speeding-really-get-you-there-any-faster-1556767685 http://lifehacker.com/does-speeding-really-get-you-there-any...