Wight and Company was hired by the Village of Oak Lawn to provide both Part A (Phase I) and Part B (Phase II) design services for the widening of approximately 1200 feet of Central Avenue at Southwest Highway. Central Avenue, a minor urban arterial street under Cook County jurisdiction, needed a new auxiliary left turn at Southwest Highway to mitigate the high number of accidents at the intersection. Staging was proposed to maintain one lane of traffic in each direction on both roads. Additional impervious pavement required a stormwater detention system, and the pavement widening required the existing traffic signals at Southwest Highway to be modified. Traffic signal modification was in accordance with the IDOT District 1 Signal Design Guidelines and Cook County Department of Highway requirements.
The project’s scope included a proposed project development report, traffic counts, IDS, accident analysis, roadway design plans, ADA accessibility considerations, traffic signal plans, specifications, construction cost estimate, and an estimate of construction time.