January 5, 2021, 11am PST
The unusual design improves traffic flow and reduces the danger of head-on collisions as cars enter the I-5 freeway.
September 18, 2017, 9am PDT
Its design can appear baffling at first, but the DDI presents drivers with far fewer opportunities to collide with each other than traditional four-way intersections.
January 10, 2014, 12pm PST
The diverging diamond interchange system planned for an exit off Interstate 70 in Grand Junction, west of Denver in Colorado, has been delayed so officials can educate the public about the new traffic pattern.
November 11, 2011, 11am PST
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.
October 12, 2011, 12pm PDT
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.