US Route 20 is a two-lane rural highway through Northeastern Illinois that curves through the Pingree Grove town center area on a relatively sharp 500-foot radius curve. The regulatory speed limit on US 20 changes from the statuary speed limit of 55 mph to 40 mph in advance of the curve in either direction and then to 30 mph in the immediate vicinity of the curve and west and southeast of the Reinking Road intersection. The intersection has an additional problem in that the existing curve is super-elevated.
The proposed improvements consist of reconstructing the intersection of U.S. Route 20 and Reinking Road and constructing a roundabout. The single lane roundabout contains an inscribed circle diameter of 145 feet with a circulatory width of 16 feet. The approach lanes widen from 12 feet to 16 feet at the entry to the roundabout and a barrier island channels the approach vehicle. The exit lanes taper from 16 feet to 12 feet to match the proposed 3-lane cross section.
Sidewalk and bike path improvements include the relocation of the existing 5-foot sidewalk, and a potential 10-foot wide bike path to match the roundabout alignment.
City of Elgin Phase I Engineering – Scope of Services