A transportation engineer sent Charles Marohn a video to prove how walkable his "diverging diamond" overpass design is. Marohn overdubbed his not-so-flattering reply.
Nov 11, 2011 New Urban Network
The FHWA says that 40% of all traffic accidents happen at intersections, and many of those are caused by left turns. A new type of intersection called the "diverging diamond" takes left turns out of the picture.
Oct 12, 2011 Slate