Study: Ride-hailing vehicles account for the majority of traffic jams in San Francisco

SAN FRANCISCO (KTVU) - A study reveals ride-hailing vehicles like Uber and Lyft account for the majority of traffic jams in San Francisco. 

Researchers the University of Kentucky analyzed millions of trips in the city between 2010 and 2016.

They found ride-shares accounted for two thirds of the 62 percent increase in weekday traffic.

Uber and Lyft both disputed the findings saying the study did not take into account job and population growth.

Traffic models that exclude Uber and Lyft cars show that hours of delay would have gone up 22% in their absence according to the San Francisco Chronicle.