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Outflow of traffic from the national capital Kuala Lumpur to the north,south and east coast highways using flow,speed and density relationships

引用

Journal of traffic and transportation Engineering(English Edition) 2016年第6期3卷 540-548页

作者： Nik Hashim Nik Mustapha Nik Nur Wahidah Nik Hashim School of Sodal and Economic Development University of Malaysia Terengganu(UMT)21030 Kuala TerengganuMalaysia Mechatronics Department School of EngineeringInternational Islamic University Malaysia(IIUM)50728 Kuala LumpurMalaysia

The functional relationships between flow （veh/km）, density （veh/h） and speed （kin/h） in traffic congestion have a long history of research. However, their findings and techniques persist to be relevant to this day. The analysis is pertinent, particularly in finding the best fit for the three major highways in Malaysia, namely the KL-Karak Highway, KL-Seremban Highway and KL-Ipoh Highway. The trans-logarithm function of density-speed model was compared to the classical models of Greenshields, Greenberg, Underwood and Drake et al. using data provided by the transport Statistics Malaysia 2014. The results of regression analysis revealed that the Greenshields and Greenberg models were statistically significant. The trans-logarithm function was also tested and the results were nonetheless without exception. Its usefulness in addition to statistical significance related to the derived economic concepts of maximum speed and the related number of vehicles, flow and density and the limits of free speed were relevant in comparing the individual levels of traffic congestion between highways. For instance, KL-Karak Highway was least congested compared to KL-Seremban Highway and KL-Ipoh Highway. Their maximum speeds, based on three lanes carriage capacity of one direction, were 33.4 km/h for KL-Karak, 15.9 km/h for KL-Seremban, and 21.1 km/h for KL-Ipoh. Their corresponding flows were approximated at 1080.9 veh/h, 1555.4 veh/h, and 1436.6 veh/h.

关键词： traffic congestion maximum flow-speed density-speed trans-logarithm function

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