• Riverwoods Road and Everett Road (2010)
• Wadsworth Road and Hunt Club Road (2011)
• Hunt Club Road and Millburn Road (2011)
• Monaville Road and Cedar Lake Road (2013)
• River Road and Roberts Road (2015)
• 14th Street at Dugdale Street (2019)
• Dilleys Road and Wadsworth Road (2020)
• Fairfield Road and Monaville Road (2021)

The 5th roundabout in Lake County is at River and Roberts Road in Lake Barrington. This video shows you how to navigate this specific roundabout and illustrates the different paths you can take:
Video: Navigating the River Road and Roberts Road Roundabout
Brochure: River Road at Roberts Road Intersection Improvement (PDF)