View All Posts

Feb 02

An Update on Construction at I-70 and Cave Springs and Zumbehl

Posted on February 2, 2023 at 1:45 PM by County Council

If you’ve driven on I-70 in the St. Charles area in the last several months, I’m sure you’ve noticed the ongoing construction at and leading up to the Zumbehl and Cave Springs roads exits. While the frustrations of driving through construction traffic are likely your first thought when passing through these areas, I hope to encourage you about the improvements this construction will bring once the projects are complete!

The bridges at Cave Springs and Zumbehl are just pieces of the bigger picture: Missouri Department of Transportation (MoDOT)’s I-70 Cave Springs to Fairgrounds Design-Build Project aims to enhance connectivity, improve safety, and provide much needed updates to this corridor. These interchanges have a higher than average crash rate, at two crashes per day on average between 2013 and 2017. Traffic jams flowing from outer roads and the interstate cause congestion, especially during rush hours. The existing infrastructure has been quickly outgrown by the number of businesses and residential areas located in this corridor, and the stretch of Cave Springs to Fairgrounds roads needs to meet the success of that.

MoDOT is expected to complete the first half of both these bridges in the spring, with traffic switching over to the new bridges this summer. The old bridges will then be demolished, making room for the second half of each to be built. You can track ongoing progress on the project website, and follow MoDOT on social media for construction updates impacting travel.

A lot of our residents and businesses have wondered what the traffic flow at these bridges will look like. These are designed to be Single Point Urban Interchanges (SPUI), similar to what you see at I-70 and First Capitol/Route 94. MoDOT is targeting the new interchanges to be in place by the beginning of 2024, with full completion of the project by June 2024.

Please take extra care while driving through these construction zones and be alert for lane closures and changes to traffic flow. I hope you enjoy viewing the progress as we get closer to project completion!