36th Street/Hill Road/Catalpa Drive Roundabout Design

KAI managed a concept design report, prepared 30% design plans, conducted extensive peer review of 75% and 95% roadway design plans, and produced final design plans for the RRFBs, illumination, signing & pavement markings, and construction phasing and traffic control for a six-leg, double teardrop shaped single-lane roundabout at the intersection of 36th Street, Hill Road, and Catalpa Drive in Boise, Idaho. This project is addressing pedestrian concerns by placing RRFBs on each public street approach to the roundabout, right-of-way and environmental constraints, and school access needs. Hillside Junior High School is located on the northeast corner of the intersection and both access points for the school have been incorporated into the roundabout. A phased design is currently planned; an interim single-lane roundabout with outside curbs and other infrastructure set in the ultimate locations so as to minimize costs when the roundabout is expanded to a multilane design (widening to the inside) in the future. The project is scheduled to be constructed in 2016.