Horner & Shifrin prepared Phase I and Phase II plans for the reconstruction of the IL 15 / IL 158 interchange in Belleville, IL, including the nearby intersection of IL 158 and IL 13. The end result is the replacement of three signalized intersections with two roundabouts. The northern roundabout has six legs of traffic and combines three state routes and eliminates two closely spaced signalized intersections which were the cause of traffic congestion in the area. A complex traffic staging plan, consisting of several stages of construction and an on-site detour, allowed the project area to be open to traffic while the roundabouts were constructed. A concrete barrier wall was designed integral with the adjacent pavement to provide the appropriate level of crash protection for the shared-use path, located immediately adjacent to the traffic lane and under the IL 15 structures.
- Special Achievement Award, American Council of Engineering Companies (ACEC) of Illinois