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...

JEFFERSON COUNTY – The Missouri Department of Transportation will host a groundbreaking ceremony with KCI Construction with Bartlett & West to mark the celebratory start of construction for the Interstate 55 Corridor Improvements Project.

The...

JEFFERSON COUNTY– The Missouri Highways and Transportation Commission (MHTC) announced the selection of the Interstate 55 Corridor Improvements Design-Build Project to the KCI Team during its monthly meeting held in St. Charles County today.

The...

JEFFERSON COUNTY - MoDOT has received Statements of Qualifications (SOQs) from teams interested in competing for the contract to design and construct improvements on I-55 from Route M to south of US-67, and on US-67 from US-61 to south of Route CC in...

REQUEST FOR LETTERS OF INTEREST FOR DESIGN-BUILD SERVICES

The Missouri Department of Transportation (MoDOT) is soliciting Letters of Interest from companies interested in providing Design-Build services for the $246 Million I-55 Corridor Project in...

JEFFERSON COUNTY - The Missouri Department of Transportation (MoDOT) is hosting virtual public meetings to hear from motorists who travel Interstate 55 between the Route Z and Route 67 interchanges in Jefferson County.

The public meetings will be...

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...