I-55 Corridor Improvements Conceptual Study in Jefferson County
The Missouri Department of Transportation’s (MoDOT) St. Louis District, in conjunction with the Federal Highway Administration, is conducting a conceptual study along Interstate 55, from the Route Z interchange to the Route 67 interchange in Jefferson County. The I-55 Corridor Improvements project area includes the cities of Pevely, Herculaneum, Festus, and Crystal City.
This initial phase allows MoDOT to understand the current corridor conditions and identify what improvements could be considered and implemented. The conceptual study will look at the existing safety, design standards, geometry, traffic congestion, bridge conditions, and utilities in the corridor. It will also consider local coordination, and future changes and growth in the area. In future phases, MoDOT will lead the project team through environmental clearance and preliminary design, final design, and construction.
For more information, download the I-55 Corridor Improvements Fact Sheet.
Districts Impacted
Phase 1 Conceptual Study Timeline
A recording of the meeting is below.
A recording of the meeting is below.
VIRTUAL PUBLIC INFORMATION MEETINGS
JANUARY 2022 MEETING
Virtual public meetings were held on Wednesday Jan. 19 and Thursday, Jan. 20. The project team presented two conceptual design alternatives and obtained feedback. In case you missed it, a recording of the meeting is below.
SEPTEMBER 2021 MEETING
Two public information meetings were held on Wednesday, Sept. 22, 2021 where the project team introduced the project, presented the corridor’s existing conditions and received motorists feedback on current problems along the corridor. If you were not able to join virtual public information meeting #1, a recording of it is below for your viewing.
Who to Contact

Jennifer Becker
Title
Project Manager
Department
St. Louis District
Contact Info
Office: (314) 453-5099
E-mail: Jennifer.Becker@modot.mo.gov
Office: (314) 453-5099
E-mail: Jennifer.Becker@modot.mo.gov

Stephen O'Connor
Title
Area Engineer, Franklin and Jefferson Counties
Department
St. Louis District
Contact Info
Office: (314) 453-5021
E-mail: Stephen.OConnor@modot.mo.gov
Office: (314) 453-5021
E-mail: Stephen.OConnor@modot.mo.gov