What is MoDOT Doing?
MoDOT will reconstruct the I-49 and 155th
Street interchange to replace the bridge over
I-49 and better accommodate the growing
area. This project is in coordination with
the cities of Grandview, Belton and Kansas
City, MO. The purpose of this project is
to reconstruct the I-49 and I55th Street
interchange with an innovative solution that
will handle an expected larger volume of
traffic, enhance the area for anticipated new
development, while accommodating existing
traffic in both Belton and Grandview.
In addition to providing smoother, more
efficient traffic flow to this growing area,
MoDOT will construct a dedicated shared
use path for all non-motorized vehicles
and pedestrian traffic. This creates a more
walkable community in the area.
How will MoDOT Change this Interchange?
Improving this interchange requires a unique design to make the needed improvements.
MoDOT’s design engineers applied their industry-leading experience and innovation to produce a very unique, new interchange. It features the diverging diamond (DDI), which switches 155th Street traffic onto the left side of the bridge to allow for better traffic flow to help alleviate the backups currently experienced in the area.
The other feature of the new design for the 155th and I-49 interchange includes a roundabout coupled to the DDI. The roundabout will allow motorists to access the outer roads and 155th Street smoothly in all directions.
This project will benefit motorists in the area by providing a smoother, safer drive overall. The DDI that transitions into a roundabout allows MoDOT to maintain full access to the East Outer Road.
This project also provides ADA compliant accommodations for pedestrians and non-motorized vehicles, helping achieve the community’s goal for a more walkable community.
Traffic models show that this newly designed interchange provides better traffic flow now and in the future. Less congestion and improved capacity reduces delays; therefore, benefits the area through improved air quality. According to the Federal Highway Administration (FHWA), projects that provide improved traffic flow, reduce vehicle idling and stop-and-start driving conditions which are associated with increased levels of emissions. Ultimately, this project can contribute to better air quality.
What is the Construction Schedule and Detours?
This project is currently going through the design process and right of way is being acquired. The project letting is November 2016. Construction could begin as early as spring 2017. Construction is anticipated to last one construction season, wrapping up by the end of 2017. This does not include the improvements on 155th Street east and west of the interchange.
For more information, call Area Engineer Matt Killion at 816-622-0500, e-mail