Critical Review and Analysis of Traditional Approach for Pre-Timed Traffic Signal Coordination and Proposed Novel Approach

Signal coordination is perceived by many agencies as a beneficial improvement to the community or corridor under consideration. In this paper, a critical review and analysis of the previously developed methodology for the pre-timed twoway signal coordination and coordination at network level has been presented. Coordination has been achieved by adopting different phase plans to reduce the vehicular delay. The study found that both the methodologies can reduce vehicular delay ranging from 30% to 60% for the assumed ideal conditions. Methodology of signal coordination should be upgraded based on TimeofDay (TOD) intervals to suit for actual traffic conditions of road network such as, change in traffic flow, change in average journey time, change in geometrics, etc. The result obtained by both methodologies has been critically reviewed and novel approach of signal setting using disutility index (DI), simulation software’s, soft computing techniques and mathematical modeling is proposed.