MoDOT engineers believe the Diverging Diamond Interchange is a good fit for some interchanges where space and funds are limited. The design helps relieve congestion in a tight area and is a quicker, cheaper reconstruction than more conventional interchange projects:
- The existing bridges can remain in place. It may be necessary to widen them, but the most of the structures are in good shape to use with the DDI design.
- Construction is shortened because the existing interchange bridge and ramps can be used, but with some modifications. That means a shorter time period for traffic disruptions.
- Since much of the existing infrastructure can be used it is cheaper to build.
- A DDI interchange can reduce traffic congestion by up to 50%.
- Left-turn crashes are eliminated and rear-end crashes reduced.
There are six Diverging Diamond Interchanges open to traffic in the Southwest District.
- Kansas Expressway (Route 13) at I-44 in Springfield - 2009
- National Avenue at James River Freeway (Route 60) in Springfield - 2010
- Route 248 at Route 65 in Branson - 2011
- Chestnut Expressway (Bus. 65) at Route 65 in Springfield - 2012
- Range Line Road (Bus. 49) at I-44 in Joplin - 2013
- Kansas Expressway (Route 13) at James River Freeway (Route 60) in Springfield - 2013
Other DDI interchanges are planned in the southwest Missouri area including:
- Battlefield Road at Route 65 in Springfield
- Christian County Route CC/J at Route 65 in Ozark
For more information, contact our Southwest District Office at 417.895.7600 or 1.888.275.6636 .
Last updated: Aug. 2013