"on their way to ending car ownership, Uber and Lyft got sidetracked and ended up clogging cities with more traffic. Between 2010 and 2016, traffic congestion in San Francisco increased by about 60 percent, and Uber and Lyft were responsible for more than half of that increase, according to a study published this year. Another study found that Uber and Lyft have added 5.7 billion miles of driving annually in cities like Boston, Chicago, Los Angeles, Miami, New York City, Philadelphia, San Francisco, Seattle, and Washington, DC."