Operational performance of adaptive traffic control systems: a microscopic simulation using PTV epics/balance local controllers

The entire priority intersection control system (Epics), supported by PTV Group, is a real-time adaptive signal control technology (ASCT) that can be used to perform real-time optimization for the signalized intersection. This study evaluated the operational performance of the ASCT using Epics/Balance Local controllers in the microsimulation environment. The analysis was based on a 4-mile corridor with ten signalized intersections along Mayport Road in Jacksonville, Florida. The VISSIM microscopic simulation model reflecting the existing condition was developed and carefully calibrated to replicate field conditions. The ASCT executed through Epics/Balance Local controllers reduced travel time, average vehicle delays, and side-street delays compared to conventional actuated-coordinated operations executed through ring-barrier controllers (RBC). Specifically, travel time was reduced by 11.1%, average vehicle delay decreased by 9.9%, and the side-street delay was reduced by up to 20%. The results were statistically significant at a 95% confidence level. These findings may provide transportation agencies and practitioners with a clear understanding of the potential of the Epics controllers in improving traffic operations at signalized intersections along the entire corridor. Also, the study results could be used by transportation agencies to justify the future deployment of adaptive traffic signals at signalized intersections.