Lake County Division of Transportation
Phase I and II Engineering
The project converted a signalized T-intersection into a multi-lane roundabout – the first multi-lane roundabout in Lake County. The project was faced with significant environmental and constructability challenges ranging from ADID wetland impacts to extremely poor soils where organic material extended 50 feet below grade and required experimental ground improvement technologies never used in the State of Illinois. An additional feature was the connection of the Lake County Forest Preserve trail leading up to and through the new roundabout. Several water quality BMPs were designed for retention and groundwater quality improvements.