During the morning rush hour, the Winton Road exit off I-590 southbound would become extremely backed up. Motorists trying to access I-590 from Winton Road in the afternoon would likewise experience long backups and delays. To solve this problem, the New York State Department of Transportation chose to construct a Diverging Diamond Interchange—an innovative design that delivers smoother traffic flow, reduces backups and delays, and improves motorist and pedestrian safety. In addition to the safety factors, the Diverging Diamond Interchange was chosen over other options because it would also take the shortest amount of time to construct, require the least amount of real estate, and provide the best cost value.
Due to the unique nature of the project’s geometry, typical methods were not used to develop the pavement elevations and slopes. Instead, a 3D model of the corridor was created by Erdman Anthony and used by the contractor for grading and final pavement construction. Services for the $5 million construction project also included geometry modifications during construction, traffic signal design, curb and island layout and details, retaining wall design, cross sections of the corridor, temporary traffic signals, and construction cost estimate. In addition, Erdman Anthony was responsible for generating handout materials and mailers for the public information meetings held before opening the interchange. A video generated by Erdman Anthony explained how to drive, walk, and bike safely through the novel interchange.