A diverging diamond interchange (DDI) at I-35 and Homestead Lane allows two directions of traffic on Homestead Lane to cross to the opposite side of the road at each ramp intersection. This configuration enables a two-phase traffic signal operation at the ramp intersections and significantly improves safety since left-turn movements do not conflict with opposing through movements. The Kansas Department of Transportation selected the DDI as the right solution to address the increase in heavy truck traffic in the area due to nearby commercial development, including the BNSF Intermodal Center.
How the DDI Works
Burns & McDonnell prepared preliminary, field check, right-of-way and final design plans for a new interchange at I-35 and Homestead Lane, as well as the reconstruction of Homestead Lane from the interchange north to 199th Street as a four-lane divided arterial roadway. Improvements included construction of a new signalized intersection at 199th Street, with appropriate turn lanes at all four intersection approaches.
The interchange features twin four-span continuous welded steel plate girder bridges over I-35. The northbound structure is a 40-foot roadway carrying two lanes of traffic, and the southbound structure is a 53-foot roadway carrying three lanes of traffic. Additional design services included a video animation, hydraulic analysis, signing, pavement markings, traffic signal design, interchange lighting, utility relocations, right-of-way acquisition, and three new traffic signals utilizing fiber optic interconnect and video detection.
2015 – APWA KC Metro Chapter – Project of the Year – Transportation ($25 million-$75 million)