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...

JEFFERSON COUNTY – Starting at 1:00 a.m. on Monday, November 17, crews will close Route CC at U.S. Route 67 intersection for road demolition and reconstruction. This closure is anticipated to remain in place through the end of December.

During this...

JEFFERSON COUNTY- Drivers should be aware that beginning at 8:00 a.m. Monday, November 10, MoDOT will close the northbound U.S. Route 67 ramp to southbound I-55. The ramp will be closed through Friday, November 21.

The ramp closure is necessary to...

JEFFERSON COUNTY- Crews will close McNutt Street under Interstate 55 from 9:00 p.m. Friday, November 7 to 5:00 a.m. Saturday, November 8. This closure will allow northbound I-55 traffic to exit, then to cross over McNutt Street, and re-enter...

JEFFERSON COUNTY- Crews will close the entrance ramp from Route A to northbound Interstate 55 from 9:00 p.m. Friday, November 7 to 6:00 a.m. Sunday, November 9.

Crews will be installing a drainage pipe under the entrance ramp.

A signed detour will...

JEFFERSON COUNTY- Crews will close Central Avenue under I-55 from 7 p.m. Friday, October 17 to 5 a.m. Monday, October 20 for bridge demolition. Traffic on northbound I-55 has been shifted onto a new bridge over Central Avenue allowing for demolition...

JEFFERSON COUNTY- Crews will close North Third Street under I-55 from 1 p.m. Friday, October 10 to 5 a.m. Monday, October 13 for bridge demolition. Traffic on northbound I-55 has been shifted onto a new bridge over North Third Street allowing for...

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...