SMART-Signal system

           The SMART-Signal system has three major components: data collection, performance measurements, and performance presentation through user interfaces. The data collection component collects high-resolution raw data directly from the field on an event-by-event basis. Signal phase change events and vehicle-detector actuation events are acquired separately from data collection units located in traffic signal cabinets. The event-based raw data will be packaged and sent to the data server located at the center in real-time. The second component of the SMART-Signal system is performance measurement using the field-collected data. A set of traffic signal performance measures, such as intersection queue length and arterial travel time, is computed using the developed algorithms. Once all performance measures have been derived from the raw data, the results are made accessible to a variety of users.

The SMART Signal system was developed by Henry Liu to improve traffic management on urban arterial corridors.