Uber and Lyft are the ‘biggest contributors’ to San Francisco’s traffic congestion, study says

Uber and Lyft have long argued that ride-hailing apps have the potential to make cities better by ameliorating traffic and reducing personal car ownership. But there is a growing body of research that suggests the opposite is taking place. The latest study, published Wednesday in the journal Science Advances, underscores how Uber and Lyft are worsening traffic in the city that gave birth to the ride-sharing phenomenon.San Francisco, home base to both Uber and Lyft, is experiencing some of its w