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...

JEFFERSON COUNTY—Crews will close all lanes of northbound Interstate 55 north of McNutt St. in Jefferson County from Monday, March 10, through Saturday, March 15, nightly from 11 p.m. to 4 a.m., weather permitting.

Crews will be setting girders for...

JEFFERSON COUNTY- Drivers who plan to travel through US Route 67 in the southern portion of Jefferson County on the weekend of March 7-9 should be prepared for delays, as crews demolished the southbound I-55 bridge over US 67. MoDOT will completely...

JEFFERSON COUNTY- Drivers should be aware that beginning at 8:00 p.m. Friday, February 28, MoDOT will begin shifting southbound I-55 traffic in Jefferson County onto the newly constructed median pavement from north of Central Avenue to south of the I...

JEFFERSON COUNTY- Drivers should be aware that beginning at on Wednesday, January 29 at 3 p.m., MoDOT will open the roundabout in the southeast portion of the I-55/US 67 interchange to northbound US Route 67 traffic and traffic exiting northbound on...

October/November Monthly Update 

Began earthwork in median from Herky Horine Road to north of Route Z. Began excavation for and construction of retaining walls for I-55 bridge over Herky Horine Road. Continued work on drilled shaft foundations for I...

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...