Impacts to Traffic

The planned construction of the Buck O’Neal Bridge over the Missouri River will provide significant enhancements to the flow of traffic, so much so that the growth anticipated on Route 9 between now and year 2040 would grow at between 1% and 2% per year.

Should the improvements to Independence Avenue, and the corresponding elimination of the I-70 / Route 9 interchange occur, that growth in traffic on Route 9 would decrease even further.

The videos below illustrate the flow of projected traffic volumes in year 2040 for both the projected AM Peak Hour (when southbound traffic is heaviest) and PM Peak Hour (when northbound traffic is heaviest)

AM traffic flow at Route 9 and Independence Avenue

PM traffic flow at Route 9 and Independence Avenue

We often evaluate signalized intersections based on their “level of service” (LOS) provided to drivers. Based on average delays per vehicle, the level of service is a rating of LOS A to LOS F, where LOS A represents minimal delays and LOS F over capacity conditions where drivers must frequently wait through multiple cycles of a traffic signal to clear an intersection. Incremental ratings of LOS B, C, D, and E represent gradually worsening conditions.

The City of Kansas City often looks to provide a LOS D or better rating at major signalized intersections, and MoDOT has a goal of providing LOS C or better. Based on the analysis for 2040 conditions, should Independence Avenue be connected with a signalized intersection to Route 9 and 3rd Street and 5th Street be converted to signalized intersections, all of the intersections would operate at LOS C or better.

Level of Service (LOS) for Route 9 intersections in study area