TERRA’s responsibilities include developing Phase II roadway plans and managing project schedule and budget. TERRA is replacing a culvert for IDOT District 1 over the West Branch of the DuPage River with a single-span bridge with a profile raise that meets hydraulic requirements. The bridge will accommodate three 12-foot lanes in each direction. Eastbound U.S. Route 20 east of the entrance east of Greenbrook Boulevard will have striping that provides a lane drop over the proposed bridge to match into the existing two lanes east of the river. The U.S. Route 20 westbound left turn lane to Ontarioville Road will be extended within the existing median to provide a maximum storage length of 400 feet. An additional westbound and northbound left turn lane will be provided in the existing medians at the intersection of U.S. Route 20 and Greenbrook Boulevard. Traffic signal upgrades will be performed at three intersections.


Illinois Department of Transportation