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The I-435 corridor was constructed in 1966 as a six-lane freeway and an additional lane was added in phases from 1983 to 1994. Improvements have been made over the past 20 years by both Kansas Department of Transportation (KDOT) and MoDOT but this corridor has been left virtually unchanged. This segment of freeway provides an important link between residents and jobs on the south side of the metropolitan area. Increased corridor maintenance, safety problems and traffic congestion have led MoDOT to develop a transportation master plan for this interstate.

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Traffic Impacts

The earlies phase of construction will have minimal impacts on traffic on I-435 as we begin the preparation work for the fist phase.

Phase 1A (April-Sept. 2018)

Traffic along I-435 will be shifted to inside lanes to allow the first step of ramp construction, widening outside lanes, begin construction on Holmes and Wornall bridges.

Phase 1B (Aug.-Oct. 2018)

Ramp alignments are shifted to newly constructed pavement. Bridge construction and outside lane construction will continue.

Phase 1C, 1D (Oct-Dec. 2018)

Phase 1C and 1D are the final steps in Phase 1 and include constructing the new ramp pavement and completing the outside paving operations .


The study limits are from State Line Road to Grandview Road in Jackson County. The study area includes the local service interchanges of State Line Road, Wornall Road, Holmes Road and 104th Street. The study area also includes the arterial roadway network north and south of the I-435 freeway corridor. The study builds on work previously performed by MoDOT and will culminate in a master plan for this section of I-435.

I-435 South Corridor Study

 The purpose of this study is to evaluate what types of improvements are needed in this section of the I-435 corridor to provide a safe and efficient transportation corridor for all modes.

Average Daily Traffic

I-435 has the highest traffic volume of any MoDOT facility in Kansas City and the second highest traffic volume in the metropolitan area.

Bridge Assessment

This report documents  existing bridge plans and inspection reports by MoDOT. The site was visited on May 14, 2014 to develop an initial assessment of the condition of the bridges.

Radmacher-Wilson Team Wins the Competition for MoDOT's I-435 Corridor Project in South Kansas City

On Dec. 1, 2017, the Missouri Highways & Transportation Commission announced that the Radmacher-Wilson Team -- construction contractor Radmacher Brothers Excavating Inc. and the engineering design firm of Wilson & Company, Inc. -- won the competition for the Design-Build project known as the I-435 South Loop Link. Work is anticipated to begin in spring of 2018 and be fully completed by late spring 2020. 

With a budget of $75 million, the department bundled multi-bridge replacements, resurfacing and corridor safety and mobility improvements from the Kansas state line to the Three Trails Crossing interchange into a Design-Build project delivery format. Interested teams competed to provide innovative, goal-driven, results-oriented transportation solutions within a fixed budget. 






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