The Missouri Department of Transportation fully opened a new roundabout constructed in the southeast quadrant of the I-55/Hwy. 67 interchange south of Festus on May 17.
Northbound I-55 traffic exiting at the Festus exit (Exit 174) to travel southbound Hwy. 67 will now use the now fully open roundabout to access Hwy. 67.
In January, MoDOT partially opened the roundabout while work continued on the project.
The roundabout work is part of an estimated $246 million I-55 Corridor Improvements project that runs from just north of Pevely to just south of Festus. The purpose of the project is to address traffic and safety concerns along the I-55 corridor and account for future development and growth patterns in the region, according to the MoDOT website.
In March 2024, MoDOT had a groundbreaking for the project, which includes constructing a third lane in both directions from Hwy. Z to Hwy. 67; replacing the signalized intersection at Hwy. 67 and Hwy. CC with an interchange that allows free-flowing traffic at of Hwy. 67 under a new Hwy. CC bridge; constructing new interchanges at Hwy. Z in Pevely, McNutt Street in Herculaneum and at Hwy. 67 south of Festus; replacing 14 bridges; rehabilitating 12 bridges and other improvements.
MoDOT awarded the design-build project to the team of KCI Construction Company, Bartlett & West and Wilson & Company.
The project’s targeted completion date is December 2026, the MoDOT website states.
For additional information about current and upcoming detours and project status, visit the I-55 Corridor Improvement project link on modot.org.
For traffic and travel information, visit MoDOT’s Traveler Information Map at traveler.modot.org/map/.