A study of ride-hailing users by the University of California Transportation Center found that nearly half would walk, bike or use public transit if they didn’t have access to such services. The director of the SFMTA has confirmed that Uber and Lyft have made traffic worse by putting an estimated 15,000 additional vehicles on the roads
Why Uber’s Expansion Plans Would Make City Life Unbearable
Paris Marx
659

I’m curious to read the source on both of these references. The links are broken.