Science Don't Be A Slowpoke: Why Left Lane Driving Causes Traffic 6:31pm August 31, 2016 Science Humans Share URL copied to clipboard! Play Pause There was an error loading the media player. Copyright 2016 NPR. To see more, visit NPR. 300x250 Ad More All Things Considered Arts 'Wild Card' with Jenny Slate Education Tips on how to deep read 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate