Working closely with W.S. Cumby Builders, Gillespie completed the electrical construction of a roundabout at the intersection of PA Route 320, Rutgers Avenue and Chester Road in Swarthmore Borough, PA in November 2015. The roundabout will eliminate confusion for drivers that have trouble interpreting oncoming and cross-traffic. The design inherently slows traffic 15-20 mph and also eliminates conflicting left turns due to the counter-clockwise direction. In addition to roundabouts being safer for pedestrians, the crosswalks and landscaping will add amenities to the intersection and increase foot traffic to Swarthmore's retail district.

For a birds-eye perspective of the roundabout, please see the below link for a video shot by Swarthmore Borough resident, Andy Shelter.