JEFFERSON COUNTY- Crews will close Herky Horine Road under I-55 at 7:00 a.m. Monday, May 11 for one month to reconstruct Herky Horine Road. All detours will be signed.

For additional information about current and upcoming detours and project status...

JEFFERSON COUNTY- Drivers who use northbound Interstate 55 between McNutt Street and Route Z should be aware the interstate will close overnight this Saturday to shift northbound I-55 onto the median pavement.

 Weather permitting, crews will close...

JEFFERSON COUNTY- Drivers who use southbound Interstate 55 between Route M and Route Z should be aware the interstate will close overnight this Friday for bridge construction. Weather permitting, crews will close all lanes of southbound I-55 on...

JEFFERSON COUNTY- A ramp closure scheduled for tonight in Jefferson County has been rescheduled until next week. Monday, February 16, MoDOT will close the northbound US Route 67 loop ramp to northbound I-55. The ramp will be closed from 9 p.m. Monday...

JEFFERSON COUNTY- Drivers in Jefferson County should be aware of an upcoming ramp closure this Friday, February 13. MoDOT will close the northbound US Route 67 loop ramp to northbound I-55. The ramp will be closed from 9 p.m. to 5 a.m.

 Northbound US...

JEFFERSON COUNTY – Drivers who use Route A to access northbound Interstate 55 should be aware the ramp will close overnight Friday, January 9 for bridge construction.

Weather permitting, crews will close the ramp from Route A to northbound I-55 as...

JEFFERSON COUNTY- Drivers who use southbound Interstate 55 between Route M and Route Z should be aware the interstate will close overnight this week for bridge construction.

Weather permitting, crews will close all lanes of southbound I-55 nightly...

JEFFERSON COUNTY – Drivers who use Route A to access northbound Interstate 55 should be aware the ramp will close overnight Friday, December 12 for bridge construction.

Weather permitting, crews will close the ramp from Route A to northbound I-55 as...

JEFFERSON COUNTY – Drivers who use northbound Interstate 55 between Route Z and Route M should be aware the interstate will close overnight next week for bridge construction.

Weather permitting, crews will close all lanes of northbound I-55 nightly...

JEFFERSON COUNTY- Crews will close McNutt Street under I-55 from 9 p.m. Friday, November 21 to 5 a.m. Monday, November 24 for bridge demolition. Traffic on I-55 has been shifted onto a new bridge over McNutt Street allowing for demolition of the old...

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...