Turbo Roundabout Conceptual Design
As part of a proposed private development in Toledo, Ohio, CESO partnered with a private automotive convenience client and the City of Toledo to explore modernized traffic solutions at the intersection of Dorr Street and Joyce Lane. Together, we evaluated a turbo roundabout – an innovative alternative to signalized intersections designed to improve safety and traffic flow. With built-in lane dividers and higher capacity, turbo roundabouts can reduce crashes by up to 50% compared to conventional multi-lane designs.
CESO’s Public Works team led the preliminary design, creating a detailed geometric layout that followed Ohio Department of Transportation (ODOT) and NCHRP Report 1043 standards. Using advanced modeling techniques such as 3D corridor modeling and digital terrain analysis, we conducted topographic and boundary surveys, determined right-of-way (ROW), and assessed key design elements including fastest paths, entry angles, sight distances, and truck turning movements. We also prepared two alternative layouts to support early-stage coordination with the City, which offered flexibility and responsiveness to stakeholder input.
Although the City ultimately selected a traditional traffic signal for the intersection, our turbo roundabout design added meaningful value to the project and expanded CESO’s portfolio of forward-thinking traffic solutions. This effort deepened our internal expertise and demonstrated our ability to deliver innovative, safety-focused designs that support more efficient transportation.