Excellence in Research and Innovation for Humanity

International Science Index

Select areas to restrict search in scientific publication database:
Roundabout Optimal Entry and Circulating Flow Induced by Road Hump
Roundabout work on the principle of circulation and entry flows, where the maximum entry flow rates depend largely on circulating flow bearing in mind that entry flows must give away to circulating flows. Where an existing roundabout has a road hump installed at the entry arm, it can be hypothesized that the kinematics of vehicles may prevent the entry arm from achieving optimum performance. Road humps are traffic calming devices placed across road width solely as speed reduction mechanism. They are the preferred traffic calming option in Malaysia and often used on single and dual carriageway local routes. The speed limit on local routes is 30mph (50 km/hr). Road humps in their various forms achieved the biggest mean speed reduction (based on a mean speed before traffic calming of 30mph) of up to 10mph or 16 km/hr according to the UK Department of Transport. The underlying aim of reduced speed should be to achieve a 'safe' distribution of speeds which reflects the function of the road and the impacts on the local community. Constraining safe distribution of speeds may lead to poor drivers timing and delayed reflex reaction that can probably cause accident. Previous studies on road hump impact have focused mainly on speed reduction, traffic volume, noise and vibrations, discomfort and delay from the use of road humps. The paper is aimed at optimal entry and circulating flow induced by road humps. Results show that roundabout entry and circulating flow perform better in circumstances where there is no road hump at entrance.
Digital Article Identifier (DAI):


[1] Robinson, B. W., L. Rodegerdts, W. Scarbrough, W. Kittelson, R. Troutbeck, W. Brilon, L. Bondzio, K. Courage, M. Kyte, J. Mason, A. Flannery, E. Myers, J. Bunker, and G. Jacquemart. "Roundabouts: An Informa- tional Guide". Report FHWA-RD-00-067. FHWA, U.S. Department of Transportation, June 2000. 2.
[2] Mohamed A. Aty, Yasser Hosni, "ROUNDABOUTS DESIGN, MODELING AND SIMULATION". STATE-OF-THE-ART. Department of Civil & Environmental Engineering University of Central Florida. March 2001.
[3] Shashi S. Nambisan, Venu Parimi (March 2007). "A Comparative Evaluation of the Safety Performance of Roundabouts and Traditional Intersection Controls". Institute of Transportation Engineers
[4] Highway Capacity Manual (2000). National Research Council Washington, D.C. United State Customary Units.
[5] G.R. Watts. "Road Humps for the Control of Vehicle Speeds". Crowthorne, United Kingdom: Transport and Road Research Laboratory Report 597, Department of the Environment and Department of Transport, 1973.
[6] ITE Technical Council Task Force on Speed Humps. "Guidelines for the Design and Application of Speed Humps". Washington, D.C., USA: Institute of Transportation Engineers (ITE), 1993.
[7] Corbridge C "Vibration in vehicles: its effect on comfort," PhD Thesis University of Southampton, 1987.
[8] X.H. Tao, X.M. Huang, "Three-mass vehicle model of people-vehicleroad interaction," J. Traffic Transport Eng. 4(3), 11-15(2004).
[9] C. S. Xu, H. H. Yi and C. X. Huang, " Experimental Study of Vehicle Modelling and Ride Comfort Simulation based on the Topology," Structure Analysing Intelligent Systems Design and Applications, ISDA '06 Sixth International Conference, Ji-an, China, 197-201(2006).
[10] E. Khorshid, M. Alfares, "Model refinement and experimental evaluation for optimal design of speed humps," International Journal of Vehicle Systems Modelling and Testing 2(1), 80 - 99(2007).
[11] David Bowrey, Rhys Thomas, Rupert Evans, Peter Richmond, Road humps: "accident prevention or hazard?", J Accid Emerg Med;13:289- 29 1 (1996).
[12] Jabatan Kerja Raya Malaysia (1987) Arahan Teknik (Jalan) 11/87 - "A Guide to the Design of at-Grade Intersections", Cawangan Jalan, Ibu Pejabat J.K.R.
[13] Highway Research Board (1965), "Highway Capacity Manual", National Research Council. Department of Traffic and Operations, Special Report 87, Committee on Highway Capacity, Washington, DC.
[14] Jabatan Kerja Raya Malaysia (1986) Arahan Teknik (Jalan) 13/86 - "A Guide to the Design of at-Grade Intersections", Cawangan Jalan, Ibu Pejabat J.K.R.
[15] Kimber, R.M. "The Traffic Capacity of Roundabouts." TRRL Laboratory Report 942. (1980).
[16] Kimber, R.M. "Gap-Acceptance and Empiricism in Capacity Prediction." Transportation Science, Vol. 23, No. 2. May 1989.
[17] Cuthbert, T. (2006). "Flow, Speed and Capacity". PTRC London Lecture Series. Retrieved 20 may 2010.
[18] Robertson, Douglas H., Et. Al., "Spot Speed Studies", CH.3 of Manual of Transportation Engineering Studies, Institute of Transportation Engineers, 1994, pp 33-51.
Vol:12 No:10 2018Vol:12 No:09 2018Vol:12 No:08 2018Vol:12 No:07 2018Vol:12 No:06 2018Vol:12 No:05 2018Vol:12 No:04 2018Vol:12 No:03 2018Vol:12 No:02 2018Vol:12 No:01 2018
Vol:11 No:12 2017Vol:11 No:11 2017Vol:11 No:10 2017Vol:11 No:09 2017Vol:11 No:08 2017Vol:11 No:07 2017Vol:11 No:06 2017Vol:11 No:05 2017Vol:11 No:04 2017Vol:11 No:03 2017Vol:11 No:02 2017Vol:11 No:01 2017
Vol:10 No:12 2016Vol:10 No:11 2016Vol:10 No:10 2016Vol:10 No:09 2016Vol:10 No:08 2016Vol:10 No:07 2016Vol:10 No:06 2016Vol:10 No:05 2016Vol:10 No:04 2016Vol:10 No:03 2016Vol:10 No:02 2016Vol:10 No:01 2016
Vol:9 No:12 2015Vol:9 No:11 2015Vol:9 No:10 2015Vol:9 No:09 2015Vol:9 No:08 2015Vol:9 No:07 2015Vol:9 No:06 2015Vol:9 No:05 2015Vol:9 No:04 2015Vol:9 No:03 2015Vol:9 No:02 2015Vol:9 No:01 2015
Vol:8 No:12 2014Vol:8 No:11 2014Vol:8 No:10 2014Vol:8 No:09 2014Vol:8 No:08 2014Vol:8 No:07 2014Vol:8 No:06 2014Vol:8 No:05 2014Vol:8 No:04 2014Vol:8 No:03 2014Vol:8 No:02 2014Vol:8 No:01 2014
Vol:7 No:12 2013Vol:7 No:11 2013Vol:7 No:10 2013Vol:7 No:09 2013Vol:7 No:08 2013Vol:7 No:07 2013Vol:7 No:06 2013Vol:7 No:05 2013Vol:7 No:04 2013Vol:7 No:03 2013Vol:7 No:02 2013Vol:7 No:01 2013
Vol:6 No:12 2012Vol:6 No:11 2012Vol:6 No:10 2012Vol:6 No:09 2012Vol:6 No:08 2012Vol:6 No:07 2012Vol:6 No:06 2012Vol:6 No:05 2012Vol:6 No:04 2012Vol:6 No:03 2012Vol:6 No:02 2012Vol:6 No:01 2012
Vol:5 No:12 2011Vol:5 No:11 2011Vol:5 No:10 2011Vol:5 No:09 2011Vol:5 No:08 2011Vol:5 No:07 2011Vol:5 No:06 2011Vol:5 No:05 2011Vol:5 No:04 2011Vol:5 No:03 2011Vol:5 No:02 2011Vol:5 No:01 2011
Vol:4 No:12 2010Vol:4 No:11 2010Vol:4 No:10 2010Vol:4 No:09 2010Vol:4 No:08 2010Vol:4 No:07 2010Vol:4 No:06 2010Vol:4 No:05 2010Vol:4 No:04 2010Vol:4 No:03 2010Vol:4 No:02 2010Vol:4 No:01 2010
Vol:3 No:12 2009Vol:3 No:11 2009Vol:3 No:10 2009Vol:3 No:09 2009Vol:3 No:08 2009Vol:3 No:07 2009Vol:3 No:06 2009Vol:3 No:05 2009Vol:3 No:04 2009Vol:3 No:03 2009Vol:3 No:02 2009Vol:3 No:01 2009
Vol:2 No:12 2008Vol:2 No:11 2008Vol:2 No:10 2008Vol:2 No:09 2008Vol:2 No:08 2008Vol:2 No:07 2008Vol:2 No:06 2008Vol:2 No:05 2008Vol:2 No:04 2008Vol:2 No:03 2008Vol:2 No:02 2008Vol:2 No:01 2008
Vol:1 No:12 2007Vol:1 No:11 2007Vol:1 No:10 2007Vol:1 No:09 2007Vol:1 No:08 2007Vol:1 No:07 2007Vol:1 No:06 2007Vol:1 No:05 2007Vol:1 No:04 2007Vol:1 No:03 2007Vol:1 No:02 2007Vol:1 No:01 2007