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Diverging Diamond Interchange Information:

How do I drive through the Diverging Diamond Interchange?

(computer animation)

Diverging Diamond Explanation Brochure (PDF)

What does a Diverging Diamond Interchange Look Like?

MoDOT engineers believe the Diverging Diamond Interchange is a good fit for some interchanges where space and funds are limited. It also works well when there is a good deal of left-turning traffic.

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.

  • At interchanges where the existing infrastructure can be used, diverging diamonds can be cheaper to build.

  • A DDI interchange can reduce traffic congestion by up to 50%.

  • Left-turn crashes are eliminated and rear-end crashes reduced.

  • It is a good solution where it makes sense to use them.  It is not the only option for improving an interchange.

There are eight Diverging Diamond Interchanges 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
  • Battlefield Road at Route 65 in Springfield - 2015
  • Christian County Route CC/J at Route 65 in Ozark - 2016


For more information, contact our Southwest District Office at 417.895.7600 or 1.888.275.6636 .

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