JEFFERSON COUNTY- Drivers who plan to travel U.S. Route 67 in south Jefferson County during the weekend of October 3-5 should be prepared for delays as crews will completely close both directions of US 67.

On Friday, October 3, and Saturday, October...

JEFFERSON COUNTY- Crews will close all lanes of northbound Interstate 55 from US 67 to McNutt Street on Friday, September 26 from 9:00 p.m. to 5:00 a.m. Saturday, September 27.

One lane of northbound I-55 will reopen at 5:00 a.m. on Saturday...

JEFFERSON COUNTY- Drivers should be aware that starting Friday, September 18, at 8 p.m., MoDOT will shift southbound I-55 traffic onto the newly constructed southbound pavement.

Starting at 8 p.m. Friday, crews will close the following:

• one...

JEFFERSON COUNTY- Drivers who use I-55 should be aware of a new traffic pattern, starting Friday, August 1 at 8 p.m., when MoDOT will shift southbound I-55 traffic onto newly constructed median pavement from south of Route Z to north of McNutt Street...

JEFFERSON COUNTY- Crews will close Route A over Interstate 55 on Monday, July 14, from 10:00 p.m. to 4:00 a.m. The purpose of this closure is to inspect the Route A bridge.

Traffic on Interstate 55 will not be impacted. A signed detour will be in...

JEFFERSON COUNTY- Crews will close the exit from southbound Interstate 55 to Route A from 9:00 p.m. to 5:00 a.m. beginning Monday, June 16.

The southbound I-55 exit to Route A will be closed nighty Monday through Friday. These nightly closures are...

JEFFERSON COUNTY- Crews will close one lane of southbound Interstate 55 and the exit from southbound Interstate 55 to Route A on Friday, June 6 from 10:00 p.m. to 1:00 a.m. Saturday, June 7, weather permitting.

Crews will be setting girders for the...

JEFFERSON COUNTY- Crews will close McNutt Street under I-55 Friday, May 30 at 10 p.m. to 5 a.m Monday, June 2 for bridge demolition. Traffic on southbound I-55 has been shifted onto a new bridge over McNutt Street allowing for demolition of the old...

JEFFERSON COUNTY- Drivers should be aware that beginning Saturday, May 17 MoDOT at 3 p.m., MoDOT will open the roundabout in the southeast quadrant of the I-55/US 67 interchange to traffic exiting northbound I-55 to southbound US 67.

Northbound I-55...

JEFFERSON COUNTY- Crews will close all lanes of northbound Interstate 55 from McNutt Street to Route Z on Friday, May 16 from 11:00 p.m. to 4:00 a.m Saturday, May 17. All work is weather permitting.

Crews will be pouring concrete for the new bridge...

March 2024 

MoDOT held the Interstate 55 Corridor Improvements Groundbreaking at the Herculaneum Fire Department on Friday, March 8 at 11 a.m.  The ceremony was open to the public and included MoDOT and its project contractor, KCI Construction Company...