Here’s a way to save lives, curb traffic jams and make commutes faster and easier − ban left turns at intersections

Research shows left turns at intersections are dangerous and slow traffic. Benjamin Rondel/The Image Bank via Getty Images

More than 60% of traffic collisions at intersections involve left turns. Some U.S. cities – including San Francisco, Salt Lake City and Birmingham, Alabama – are restricting left turns.

Dr. Vikash Gayah, a professor of civil engineering at Penn State University and the interim director of the Larson Transportation Institute, discusses how left turns at intersections cause accidents, make traffic worse and use more gas.