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US 20 at Marengo, Beck, Union, and East Coral Roads Roundabout Design


Image Courtesy of Illinois Department of Transportation

As a subconsultant, TranSmart performed a peer review of the overall highway plan set design, and a quality review of intersections and adjacent highway segments for the reconstruction of a five-legged, roundabout intersection and upgrades to the adjacent segments of US 20. TranSmart reviewed preliminary design features and horizontal geometry and made recommendations; performed horizontal and vertical clearance checks for various overweight and oversize-designed vehicles; and advised on maintenance of traffic (MOT) staging plans. TranSmart also prepared signing plans for intersection and approaches, and signing details for directional signs.


Illinois Department of Transportation (IDOT)


Roadway Design - Streetscape/Bicycle Accommodations/Transit/Specialty



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