Uber and Lyft have made traffic much worse in San Francisco. Researchers used traffic models and data from the company's apps to show that the ride sharing companies increased delays by 62 percent between 2010 and 2016. Without them, traffic would've only gotten about 22 percent worse in that time.

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Uber and Lyft have made traffic much worse in San Francisco. Researchers used traffic models and data from the company's apps to show that the ride sharing companies increased delays by 62 percent between 2010 and 2016. Without them, traffic would've only gotten about 22 percent worse in that time.