12/11/2025 | Press release | Distributed by Public on 12/11/2025 12:27
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 well as the right lane of northbound I-55 Friday, December 12, from 9 p.m. to 5 a.m.to set girders for the I-55 bridge over Third Street.
A signed detour will direct traffic around the closure. Drivers can take U.S. Route 61/Route 67 north toward Herculaneum, take a left onto McNutt Street and take the ramp on the right side of McNutt to enter northbound I-55.
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/.