CHARACTERISTICS OF SIGNALIZED INTERSECTIONS WHICH NEED ADVANCED TRAFFIC CONTROL SYSTEMS APPLICATION

Advanced Traffic Control Systems (ATCS) are usually used in large cities in developing countries to ease congestion problems. However, the application of the systems is not to all signalized intersections in the city. Local conditions such as geometric conditions and traffic conditions should be taken into account seriously. The aim of this study is to identify characteristics of signalized intersections which need to be under ATCS. Field data were collected at 19 signalized intersections under ATCS surveillance and 10 streams related to the intersections, in Bandung Indonesia. Manual traffic counts, video cameras, and floating car technique were used to collect the data during morning peak period (07:00-08:00 am), off peak periods (10:00-11:00 am), and afternoon peak period (04:30-05:30 pm). Measurements to determine the characteristics of signalized intersections are throughput per capacity at each leg intersection, number of queue at each leg intersection, and travel time at each stream. The results found that the application of ATCS is recommended to signalized intersections with characteristics of many leg intersections, located in CBD, closed distance to adjacent intersection and high side frictions. The findings of this study are very beneficial not only for Bandung but for other large cities in Indonesia that have similar local conditions. Therefore, the application of ATCS with very high cost can be implemented only to the necessary signalised intersections.