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...

JEFFERSON COUNTY- Drivers should be aware that beginning at 8:00 p.m. Friday, May 9, MoDOT will shift southbound I-55 traffic onto newly constructed median pavement from north of McNutt Street to north of Central Avenue.

This traffic shift will tie...

JEFFERSON COUNTY- Crews will close Central Avenue under I-55 from 7 p.m. Friday, March 28 to 5 a.m. Monday, March 31 for a bridge demolition. Traffic on southbound I-55 has been shifted onto a new bridge over Central Avenue allowing for the...

JEFFERSON COUNTY- Crews will close North Third Street under I-55 in Jefferson County starting at 7 p.m. on Friday, March 21 for bridge demolition.

North Third Street will be closed on Friday, March 21 at 7 p.m. until 5 a.m. on Monday, March 24...

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...