The Illinois Department of Transportation sought to reconstruct and widen US Route 30. We performed a partial Phase I and complete Phase II engineering services for this reconstruction and widening. The project included the widening of approximately 2.4 miles of US 30 in Kendall County. The existing corridor was predominately a two-lane rural section and was widened with polyester polymer concrete pavement to a four‑lane urban section with a landscaped median and noise abatement walls adjacent to residential properties.

Because the Phase I Combined Design Report was 15 years old, we revised two of the Intersection Design Studies to reflect the current conditions of the corridor and projected average daily traffic. Four intersections within the project had a variety of improvements, including reconstruction of three intersections, the addition of dual left-turn lanes, new traffic signals, traffic signal modernization, traffic signal interconnection, and emergency vehicle preemption systems. The intersection of US 30 and Douglas Road also had intersection lighting and transition lighting on each of the four legs. US 30 is the main principal arterial through the commercial districts of the villages of Montgomery and Oswego. As a result, it was not possible to close US 30 and provide detours. To maintain two-way traffic throughout the duration of the project, an innovative Maintenance of Traffic (MOT) Plan was designed that included four main construction stages with temporary pavement widenings, ramps, and crossovers.

Local agency coordination played a key role in the success of the project. The project involved coordination with the Village of Montgomery, Village of Oswego, Oswego Township, and Oswegoland Township Park District. Local agencies provided cost participation for improvements to intersections, the addition of sidewalks and street lighting, and removal and relocation of water main.