Ingenieur Vol. 74 Ingenieur Vol 72, April-June 2018 - Page 53

CONCLUSION Improvement of traffic signal co-ordination and timing is one of the most important strategies for increasing travel speed and reducing delays in urban areas. SIDRA 6.0 can help analyse and improve traffic conditions in particular situations such as junctions and roundabouts. It can also help in the planning of the most appropriate design for a particular situation, especially improving the LOS of traffic flow. From the results and outputs from the study, we can see a lot of changes especially in LOS. With the addition of a new lane and a new slip lane at critical junctions, the overall LOS can be improved from grade F to C. By using the recent SIDRA 6 package, it was revealed that the total average delays, queue distances, degree of saturation and CO 2 emission decreased, and the system travel speed was increased. Thus, a wide range of improvements can be observed from the results before and after optimisation of traffic flows at the intersections. RECOMMENDATIONS Based on the conclusions derived from the studies before and after optimisation of the T-Intersection on Bukit Chedang, Rasah Seremban, several recommendations for future research can be proposed: a. The use of advanced control cameras like CCTV cameras to alleviate congestion and remove obstacles in the movement of traffic within the study area, b. Using a sensor during congestion times at signalised junctions and rearranging green time and automatic phasing time, c. Use of traffic control systems (SCATS) which can minimise the possibility of traffic jams by controlling the formation of queues. d. It could be useful to study the results obtained from current software such as PARAMICS, VISSIM and Highway Capacity Software (HCS) for the same case study and compare them with those obtained from SIDRA 6.0. e. The last recommendation is to encourage the change from private transportation to public transportation to get rid of congestion and blocking traffic on the road. REFERENCE J. Salzman, J. Ruhl, and K.-S. Song. (2002). Regulatory Traffic Jams. Wyo. L. Rev. 2: 253. W. Hook and M. Replogle. (1996). Motorization and Non-motorized Transport in Asia: Transport System Evolution in China, Japan and Indonesia. Land Use Policy. 13: 69–84. L. Oduwaye. (2007) “Effects of Institutional Land Uses on Road Traffic in Metropolitan Lagos”. The Social Sciences. 2: 255–263. H. Taale and H. Van Zuylen. (2001) “Testing the HCM 1997 Delay Function for Dutch Signal Controlled Intersections”. In Proceedings of 80th Annual Meeting of Transportation Research Board, Washington DC. 3. R. Akcelik and M. Besley. (2003) “Operating Cost, Fuel Consumption, and Emission Models in aaSIDRA and aaMOTION”. In 25th Conference of Australian Institutes of Transport Research (CAITR 2003). 1–15. S. I. Albrka, A. Ismail, H. A. Yahia, and M. A. Ladin. (2014) “Application of Transyt-7f on Signalised Road Junction Networks in Shah Alam and Petaling Jaya” Jurnal Teknologi. 69. Srinivas Mandavilli and Eugene R.Russell. (2003), Impact of Modern Roundabouts on Vehicular Emissions. N. M. Shariff. (2012) “Private Vehicle Qwnership and Transportation Planning in Malaysia” In International Conference on Traffic and Transportation Engineering. H. C. Manual. 2000. Highway Capacity Manual. Washington, DC. 51