There’s a reason Popular Mechanics named the diverging diamond interchange (DDI) one of the top engineering innovations: It reduces traffic congestion by up to 60 percent.
The project began when the Missouri Department of Transportation asked us to improve capacity at the Battlefield Road and Route 65 diamond interchange in Springfield. We collaborated with Hanson Professional Services and TREKK Design Group to help prepare plans, which included converting the interchange to a diverging diamond interchange, replacing an existing bridge, designing drainage systems, placing traffic signs and signals, and constructing auxiliary lanes. Our team identified an additional opportunity to improve the interchange by upgrading the roadway from two lanes to three lanes in each direction, providing added traffic capacity and functionality.
Our attention to detail made the construction phase easy for drivers to navigate. Aware of the frustrations caused by road construction, especially for locals inconvenienced daily, we developed two solutions. First, wider, full-depth shoulders were built on Route 65, which were used as temporary lanes. Second, we nixed the use of traditional traffic control methods in favor of a temporary DDI, allowing for efficient left-turn movements, which greatly reduced delays compared to traditional alternatives.
An interchange design that reduces accidents, improves traffic flow and was completed on time—quite a gem, indeed.
Best Use of Innovation in the small project category, Mid-America Association of Transportation Officials awards
Overland Park, Kansas
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