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...

JEFFERSON COUNTY- Crews have closed one northbound lane on Interstate 55 near Route Z for emergency pavement repairs. The lane is expected to remain closed until 10 p.m. Tuesday, September 3.

Drivers traveling in Jefferson County on northbound I-55...

JEFFERSON COUNTY –Motorists traveling on U.S. Route 67 in Jefferson County should be aware of the upcoming traffic switch starting Monday, July 29. Starting Monday night, crews will shift traffic heading southbound on US. Route 67 onto a section of...

JEFFERSON COUNTY – Beginning Wednesday, June 19 at 8 p.m. until 6 a.m. Thursday, June 20, crews will close the loop ramp from southbound I-55 to northbound US 67. 

The closure was originally scheduled for Monday, June 17.

The Missouri Department of...

 JEFFERSON COUNTY – Beginning Monday, June 17 at 8 p.m. until 6 a.m. Tuesday, June 18, crews will close the loop ramp from southbound I-55 to northbound US 67. 

The Missouri Department of Transportation will place temporary concrete barrier in the...

JEFFERSON COUNTY – Beginning Saturday, June 1 at 8 p.m., the Missouri Department of Transportation will close the southbound Interstate 55 ramp to northbound US Route 67. The ramp will be closed Saturday, June 1 from 8 p.m. until 8 a.m. and Monday...

JEFFERSON COUNTY – The start of construction for the $246 million I-55 Corridor Improvements Project was celebrated today with an official groundbreaking ceremony.

The ceremony took place at the Herculaneum Fire Department at 11 a.m. with I-55...

JEFFERSON COUNTY – Due to the possibility of inclement weather conditions in Friday’s forecast, the location for the Interstate 55 Groundbreaking ceremony has been changed to the Herculaneum Fire Station. The fire station is located at 151 Riverview...

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...