JEFFERSON COUNTY- Crews will close Central Avenue under I-55 from 7 p.m. Friday, October 17 to 5 a.m. Monday, October 20 for bridge demolition. Traffic on northbound I-55 has been shifted onto a new bridge over Central Avenue allowing for demolition...

JEFFERSON COUNTY- Crews will close North Third Street under I-55 from 1 p.m. Friday, October 10 to 5 a.m. Monday, October 13 for bridge demolition. Traffic on northbound I-55 has been shifted onto a new bridge over North Third Street allowing for...

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...

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...