Analysis of the Emission Reduction through PerformanceImprovement of Intersection and Network nearby Using MicroSimulation Program

Introduction:Palembang as one of the big cities in Indonesia is the capital city of South Sumatra Province. Congestion occurs at the mainintersections of the city, one of which is Simpang Patal Pusri which has a long queue and delays in peak hour of 655 m and 490seconds. The action performed to improve traffic performance and reduce the air pollution at this intersection was the underpassconstruction. This study discussed the importance of constructing an underpass together with improving geometric design and trafficmanagement at the nearest intersections to obtain optimal results in addressing traffic problems and emissions reductions. Methods:To analyze the performance of traffic intersection and its network, Vissim simulation micro program and Program Moves were usedto find out the emission values ​​of Total Carbon, NOx and PM10 of the analyzed handling scenarios. Results:The results showed that the construction of an underpass accompanied by the improved geometric design and traffic management atthe nearest intersection produced better intersection performance and emission reductions when compared to only underpassconstruction, where the average V/C decreased from 0.87 to 0.77, the average queue decreased from 290.3 m to 190.57 m, and theaverage delay decreased from 106.34 seconds to 85.07 seconds. The values ​​of Total Carbon, NOx and PM10 also decreasedsignificantly on all the roads in the study area. Conclusion:Based on the analysis, a scenario of the underpass construction is combined with geometric improvement and traffic management atthe intersections which provides the best traffic performance and emissions reduction at either the intersections or road segments ofthe road network being studied