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...

JEFFERSON COUNTY- Crews will close all lanes of northbound and southbound Interstate 55 south of Route Z on Sunday, October 27 from 12 a.m. to 5 a.m., weather permitting.

Ameren crews will be relocating a transmission line that crosses Interstate 55...

JEFFERSON COUNTY- Drivers should be aware that MoDOT will close the southbound Interstate 55 loop ramp to northbound U.S. Route 67 starting Thursday, October 24,

Starting at 9:00 p.m. Thursday, October 24, southbound I-55 traffic will access...

JEFFERSON COUNTY- Drivers traveling in Jefferson County on northbound I-55 south of Route Z should consider alternate routes due to an emergency pavement repair. Crews will close one northbound lane on Interstate 55 near Route Z starting at...

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...