In 2005 MTJ began working with the developer’s traffic consultant to find an acceptable access solution for the proposed commercial development at USH 18 and STH 83, which was a signalized intersection at the time.

Finding an acceptable solution proved problematic due to the spacing requirements necessary to accommodate the queuing between the two signalized intersections.

MTJ developed a successful two-roundabout solution that provide roadway and intersection capacity/safety to the new commercial site. They maintain existing businesses (with no impacts) and accommodate future STH 83 widening plans for WIDOT. The two- roundabout solution includes a compact 125’ multi-lane roundabout at STH 18 and Blackwood Dr. (opened in 2006) to serve the new development, with a design for the future planned roundabout to replace the existing signal at STH 83/STH 18 (opened in 2015). Both roundabouts included OSOW analysis and design recommendations for horizontal and vertical design accommodations for the long wide-load corridor needs.