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Investigation of breakdown event at merging sections of federal highway

Sanik, Mohd Erwan (2013) Investigation of breakdown event at merging sections of federal highway. Other thesis, Universiti Tun Hussein Onn Malaysia.


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Breakdown occurs when there is a change of velocity in a traffic stream due to traffic flow. It happens when the average travel velocity reduce from normal to a lower value of congested conditions while there are still vehicles coming although capacity is reached. Breakdown might frequently happen nearby on-ramp or at merging section. This study aims to investigate the breakdown event at two difference sites near merging section of Bulatan Melawati Interchange at the Federal Highway Route 2. Federal Highway Route 2 is equipped with the Automatic Incident Detection devices which monitored by the Transportation Management Centre of the Kuala Lumpur City Hall to collect traffic data for management purposes. Data from the device are obtained for analysis and presented in a speed-flow relationship model where breakdown speed and capacity at merging section can be determined. Based on developed time series of flow rate and speed, a total of 30 breakdown events have been identified at study locations. Later, Speed-flow models are developed using actual data and Greenshields modelling. Capacity and critical speed using Greenshields modelling are 1756 vehlhrlln and 33 kmlh, and 2380 veh/hr/ln and 77 km/h at Site A and B, respectively. Breakdown phenomenon occurs at study locations are still under control since the breakdown occurrence usually disperses within 1 to 2 hours. This study contributes to better understanding of breakdown phenomenon which benefits in control strategy and effective geometric design in the future.

Item Type: Thesis (Other)
Subjects: T Technology > TE Highway engineering. Roads and pavements
Divisions: Centre of Diploma Studies > Department of Civil Engineering
Depositing User: Normajihan Abd. Rahman
Date Deposited: 22 Jun 2014 01:16
Last Modified: 22 Jun 2014 01:16
URI: http://eprints.uthm.edu.my/id/eprint/5586
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