Are you a late merger? You might be on to something, according to Tom Vanderbilt, author of the new book "Traffic: Why We Drive the Way We Do (and What It Says About Us)." In this segment, Ira talks with Vanderbilt about the psychology of driving and the engineering of roadways. Hear why roundabouts are safer than intersections, how slower can actually be faster and other seemingly contradictory traffic truths.
Produced by Annette Heist, Senior Producer