Route 25/K Intersection Safety Improvements - Roundabout

Our Route 25/K Intersection Safety Improvements – Roundabout Project has won an Honor Award in ACEC Missouri’s 2025 Engineering Excellence Awards!

The Missouri Department of Transportation (MoDOT) hired Lochmueller to conduct a traffic study and recommend intersection improvements for the Route 25 and Route K intersection in Gordonville, Missouri – a three-leg intersection with stop control on the westbound Route K approach. The intersection experienced high peak hour volumes from traffic heading to and from Cape Girardeau, Missouri, and resulted in long queues and significant delays for the westbound approach during both the morning and afternoon rush hours, and a crash rate 15 times the expected rate for the intersection.

The results of the traffic study revealed that both the traffic signal and roundabout would improve traffic operations at the intersection, but the roundabout would perform significantly better for the westbound movements. In addition, a roundabout provides important safety benefits and lowers long-term maintenance costs over a signalized intersection, making it the desired solution. Upon completion of the traffic study, MoDOT selected Lochmueller to finalize the design. Lochmueller developed a detailed 3D model of the roadway improvements and final construction plans utilizing Open Roads Designer.

The traffic study began in October 2021 and was completed in May 2022. The final design began in June 2022 and was completed in October 2023. The project was put out to bid in December 2023 and construction was completed ahead of schedule in September 2024. Lochmueller is proud to have had the opportunity to collaborate with MoDOT on this project. Enhancing the safety of intersections and traffic for drivers has been and always will be a top priority for Lochmueller!