Today on the podcast: Are traffic engineering decisions based on evidence-based research? Not as much as you might think. Some traffic engineers are calling for the field to accept more blame for crashes and the tens of thousands of annual fatalities that happen on our roads, including Dr. Wes Marshall, a professor of civil engineering at the University of Colorado Denver. In his book, "Killed By A Traffic Engineer: Shattering the Delusion that Science Underlies our Transportation System," he