The Naperville Auto Test Track, designed and engineered by Epstein, is a 7-acre facility located in Naperville, Illinois that provides a way for automobile customers to safely test drive passenger cars, light trucks and sport utility vehicles in a closed environment. The track is designed to allow drivers to experience everyday road conditions during their test drive, such as asphalt roadway, a railroad crossing, cobblestone surface area, suburban driveway, high bank testing area, skid pad, and an SUV testing area with a hill climb and rough road section.