MoDOT - Missouri Department of Transportation

03/05/2026 | Press release | Distributed by Public on 03/05/2026 12:00

Route A ramp to NB I-55 in Jefferson County to close overnight Saturday

JEFFERSON COUNTY- Crews will close the entrance ramp from Route A to northbound Interstate 55 and a single lane of northbound I-55 between Route A and Central Avenue from 9 p.m. Saturday, March 7 to 5 a.m. Sunday, March 8. Central Avenue will be closed under I-55, beginning at 8:30 p.m. on Saturday.

Closure of Central Avenue, the entrance ramp from Route A to northbound I-55, and the single lane of northbound I-55 is to allow crews to pour the deck of the new northbound I-55 bridge over Central Avenue. All work is weather permitting.

Drivers on Route A can use US Route 61/67 to access northbound I-55 via the McNutt Street interchange. Central Avenue will detour under I-55 via 5th Street. All detours will be signed.

For additional information about current and upcoming detours and project status, please visit the I-55 Corridor Improvement project website at: Interstate 55 Corridor Upgrades in Jefferson | Missouri Department of Transportation (modot.org).

For up-to-date traffic and travel info, motorists can check MoDOT's Traveler Information Map at http://traveler.modot.org/map/.

MoDOT - Missouri Department of Transportation published this content on March 05, 2026, and is solely responsible for the information contained herein. Distributed via Public Technologies (PUBT), unedited and unaltered, on March 05, 2026 at 18:00 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]