Developed in 2000 by Gilbert Chlewicki, the DDI is an innovative interchange that reduces congestion and enhances the safety of high-volume traffic areas. Where an avenue meets a freeway, the DDI permits two directions of traffic to briefly drive on the opposite side of the road, limiting turn delays for drivers entering and exiting the highway.
Named to Popular Science's "Best of What's New" list in 2009, and used in only a few other states, the DDI is an on-the-rise interchange in the U.S. The 2013 construction of the 34th Ave. DDI debuted this unique formation in the Twin Cities. The 34th Ave. S. DDI is the only DDI that incorporates a rail line in its design.