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I-255 Rehabilitation Project
Rehabilitating and resurfacing of I-255 from Illinois 157 to Illinois 15 to improve traffic flow, efficiency and safety in St. Clair County.
Overview
Starting in February 2025, the rehabilitation and resurfacing of Interstate 255 fixes a badly deteriorated section of the interstate in the St. Louis Metro East area. While this project will require a complete closure of the interstate to all traffic for an estimated six months, this approach will lead to a quicker project completion, increased safety, and cost savings for taxpayers.
The benefits from a complete interstate closure include:
- Completion of the project in six months instead of two years.
- Save taxpayers over $10 million, plus the ongoing costs of repairing lanes that would need to stay open with staged construction.
- Eliminate significant traffic backups entering a work zone, lane shifts for new configurations, thus reducing crashes and driver confusion.
- Ensure the safety of workers during construction by keeping traffic out of the work zone.
The project, funded by Rebuild Illinois, consists of rehabilitating and resurfacing approximately 3.5 miles of Interstate 255 from Illinois 157 to Illinois 15 in St. Clair County, with bridge repairs, safety improvements, new lighting, signing, and drainage upgrades.
Improvements to I-255 from Illinois 15 to Collinsville Road were completed in 2020. The work in 2025 will focus on I-255 from Illinois 157 to Illinois 15.
Closure: Feb. 1, 2025
Estimated Completion Date: July 31, 2025
Awarded Construction Cost: $65.4 million
Detour and Alternate Routes
Project Updates
February 2025
March 2025
April 2025
May 2025
June 2025
July 2025
For more information on the I-255 project, follow IDOT District 8 on the social media platform X at @IDOTDistrict8 or subscribe for updates and notifications.
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For more information on the I-255 project, follow IDOT District 8 on the social media platform X at @IDOTDistrict8 or subscribe for updates and notifications.
