UTHM Institutional Repository

Probabilistic analysis of breakdown at merging sections of expressway in Malaysia

Sanik, Mohd Erwan and Prasetijo, Joewono and Yahya, Ahmad Shukri (2011) Probabilistic analysis of breakdown at merging sections of expressway in Malaysia. In: 2nd Civil Engineering Colloquium 2011, 23-24 March 2011, Universiti Sains Malaysia, Penang.


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This research, in general, aims to investigate the breakdown phenomenon at on-ramp merging sections of expressway in Malaysia. Expressway is an uninterrupted flow facility that accommodates high volume of traffic flow with high speed and only accessible via on- and off-ramps. These two parameters; flow and speed, characterize the traffic flow model of uninterrupted flow facility. If these parameters are deeply studied, there is an exclusive condition of flow occurs between the steady flow and congested flow. This condition can be called „breakdown‟. Breakdown was defined in various explanations by different researchers but mostly still studied in a similar approach. Therefore, with regards to Malaysian unique traffic condition, the purpose of this research is to establish the breakdown probabilistic model by determining and analyzing the breakdown speed and flow. One of the major tasks in this research is the collection of field data. The methods used may consist of either loop detection, intelligent image processing or radar detection techniques. However, only an established data collection procedure will be used in order to ensure the consistency of the outcomes. Data will be analyzed based on the fundamental traffic flow model of speed-flow relationship. Simultaneously, the duration and queue discharge flow of breakdown will be obtained by developing the time series plotting of speed and flow versus actual time. Lastly, the breakdown distribution functions will be obtained using appropriate distribution. The outcomes of this research are expected to support the findings of previous researches that the breakdown probability is an increasing function of main-stream and on-ramp flow rates. However, in-depth study will be carried out through this research to specify which condition that really affecting the breakdown probability especially with respect to Malaysian expressway traffic.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: breakdown; expressway; flow; on-ramp; speed
Subjects: T Technology > TE Highway engineering. Roads and pavements
Divisions: Faculty of Civil and Environmental Engineering > Department of Infrastructure and Geomatic Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 26 Mar 2013 00:41
Last Modified: 21 Jan 2015 08:14
URI: http://eprints.uthm.edu.my/id/eprint/3454
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