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The original item was published from 12/11/2025 2:41:58 PM to 12/14/2025 12:00:00 AM.

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County News

Posted on: December 11, 2025

[ARCHIVED] MoDOT to close Route A ramp to NB I-55 in Jefferson County overnight Friday

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/.



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