A double roundabout interchange would include a roundabout at the northbound and southbound entrance and exit ramp, eliminating the need for traffic signals or stop signs for traffic passing through the corridor or entering or exiting the interstate. Roundabouts can significantly improve safety by eliminating head-on and angle-type crashes that exist at signalized intersections.
Benefits include:
Are becoming a more common intersection type that more drivers are familiar with
Do not require power to operate, and require less maintenance than a traffic signal
Reduce serious crash types that often result in injuries or fatalities
Keep traffic flowing, requiring only yielding to traffic within the roundabout
Examples of interchanges with roundabouts in Michigan include:
US-23/Lee Road in Livingston County
I-94/North Elm Avenue in Jackson
I-94/M-106 in Jackson