The new report was produced by researchers at the University of California, Davis Institute of Transportation Studies — one of five leading national transportation research centers funded by the U.S. Department of Transportation.
Uber and Lyft most likely add to traffic in major cities today
In this study based on data collected in major cities across America, we found that a large portion of travelers are substituting ride-hailing in place of public transit, biking, and walking trips, or would not have made the trips at all (Fig. 1). These trips, which are being substituted for or generated by ride-hailing, are most likely adding vehicles to the road in major metropolitan areas. There is a significant need for future research on the topic — the most recent findings from major cities seem to suggest that ride-hailing is likely adding to, not reducing traffic congestion.