Authors : Lambang Basri Said, Abdul Kadir Salim and Andi Alifuddin
Abstract: Degree of saturation happened in the observed intersection in Makassar is between 0.6 and 1.0 and it has low performance at the level of service score F (poorest) with high blocked frequency. This study is a design to develop the pattern of intersection handling to address the problem of comprehensive transportation. The system used simulation techniques for management and traffic engineering by implementing traffic circle and underpass as an alternative to improve intersection services. The study is designed in 2 years research at which in the first year it is more focused on traffic light design related to the operational time setting and cycle time setting as well as the number of optimum phase to be more increasing capacity and all at once measuring service performance from the implementation of traffic light. While in the second year is focused on designing of traffic circle and underpass as a key element in the analysis that research integrated with the traffic light in determining the performance and services level of technical/traffic engineering to measure cost savings and service levels, efficiency of time value and traffic delays as well as the difference in travel time for perspective use until 2025. The number of cycle obtained from optimum phase was 153 sec by green time of each approach that is North by 28 sec, South by 36 sec, West by 38 sec and East by 4 sec. This value was expected to be able to overcome queue from 6-160 vehicles and traffic delays by 18 until 54 sec of every vehicle while waiting for development of underpass and traffic circle finished. In a similar way, value of traffic delays and length of queue shows 11 sec per vehicle and 0.975 stop/vehicle. Effectiveness of intersection services can be increased to be better by developing underpass design. This is expected to decrease the degree of saturation from 1.0-0.2 at Perintis Kemerdekaan Street and 0.9-0.3 at Poros Maros Street.
Lambang Basri Said, Abdul Kadir Salim and Andi Alifuddin, 2017. A Mixture of Traffic Circle and Underpass to Increase Capacity of Intersection. Journal of Engineering and Applied Sciences, 12: 8436-8440.