EVALUATION OF ADVANCE COORDINATION FEATURES IN TRAFFIC SIGNAL CONTROLLERS

This report describes the research conducted to have a better understanding of the coordination features in the Eagle and Naztec traffic signal controllers. The features evaluated included force-off modes, transition modes, and coordination modes. The project illustrated many similarities in the functionality of these features in both the Eagle and Naztec controllers. The project found that using fixed force-off has the potential to significantly reduce delay to the cross street phase which is the last phase in the phasing sequence. The project evaluated the correction modes and recommended the Shortway mode of correction. Other modes can be used based on local preferences. The investigation of coordination modes revealed that no single coordination mode can be stated as the recommended mode. The research team found that it is better to determine the desired mode of operation and select the appropriate coordination mode. This approach can then be consistent methodology to select the coordination mode in both the Eagle and Naztec controllers.