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Traffic Pattern to be Shifted for Johnsburg Road Bridge

Post Date:06/26/2019 12:53 PM

JOHNSBURG, Ill. – A minor traffic pattern shift is needed on the Johnsburg Road bridge over Dutch Creek, just east of Riverside Drive, to compensate for a deficiency in a load-bearing beam.

Workers in the first week in July will stripe off a 4-foot section near the center of the road to navigate vehicles off of the beam section under the left turn lane onto southbound Riverside Drive. As a result, both the west to southbound turn lane and the westbound through lane will be reduced in width from 11 feet to 10 feet, and the westbound shoulder will be reduced from 10 feet to 8 feet. These width reductions also will require new striping, which will slightly alter the current pavement marking layout. Eastbound lanes will not be altered.

The road striping will be augmented in late July with the installation of delineator poles to keep traffic off of the beam.

MCDOT’s bridge consultant discovered two cracks running down the length of the concrete support beam during their last inspection of the bridge, which Illinois Department of Transportation inspectors subsequently confirmed. Further reducing the existing load posting of 32 tons for two-axle vehicles and 37 tons for three axles or more is impractical for the bridge, which receives 11,000 vehicles a day. The bridge was built in 1994.

Please obey work-zone speed limits and be mindful of workers when the work is being done.

While the pattern shift address the immediate need for the Johnsburg Road Bridge to remain open to traffic, it will be added to our Five-Year Transportation Program to address long-term needs. IDOT has approved the traffic lane shift to address the current issues with the bridge – the bridge and Johnsburg Road will continue to be inspected by MCDOT and IDOT to ensure the public’s safety.

Visit our website at to learn more about us and to review our Five-Year Transportation Program. Like us on Facebook at and follow us on Twitter at @DOTMcHenry to learn about upcoming and ongoing construction projects.

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