Jefferson County, MO – Drivers in Jefferson County should prepare for overnight delays this week as MoDOT closes a stretch of northbound Interstate 55 for bridge work. The closures begin Tuesday night and continue through early Saturday morning, impacting late-night and early-morning travel.
According to the Missouri Department of Transportation, crews will shut down northbound I-55 between Route Z and Route M nightly from December 9 through December 13, with closures running from 11 p.m. to 4 a.m. The work is required so crews can set bridge girders over the BNSF railroad line.
MoDOT says a marked detour will direct drivers onto Route 61/67, and motorists traveling toward the St. Louis metro area should allow extra time, especially if commuting during the overnight hours. The department notes that delays may vary depending on traffic volume, weather conditions, and construction progress.
The closure affects a critical commuter corridor connecting portions of Jefferson County with Arnold, Festus, and the broader St. Louis region. While daytime travel will not be impacted, drivers who rely on overnight routes—such as shift workers, freight traffic, and emergency services—should plan for rerouting throughout the week.
MoDOT advises motorists to use caution near all work zones and to watch for additional updates as the project progresses.
This article was produced by a journalist and may include AI-assisted input. All content is reviewed for accuracy and fairness.
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