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Title: Vehicle headway distribution in work zones
Authors: Weng, J.
Meng, Q.
Fwa, T.F. 
Keywords: lane position
traffic flow
vehicle headway
work intensity
work zone
Issue Date: 2014
Source: Weng, J., Meng, Q., Fwa, T.F. (2014). Vehicle headway distribution in work zones. Transportmetrica A: Transport Science 10 (4) : 285-303. ScholarBank@NUS Repository.
Abstract: This study investigates work zone vehicle headway distribution by disaggregating the vehicle headways into four types: car-car, car-truck, truck-car and truck-truck. It first confirms that the four types of vehicle headways are significantly different by performing the Kruskal-Wallis and Mann-Whitney tests using work zone headway data from Singapore. The statistical test results further show that four factors - traffic flow rate, percentage of trucks, work intensity and lane position - have a significant impact on each type of vehicle headway in work zones. A useful methodology is thus proposed to determine the best-fitted headway distribution model for each type, which includes two procedures: determining the best distribution pattern for each type using the maximum-likelihood estimation and Kolmogorov-Smirnov test techniques and formulating the distribution model parameters as a function of the aforementioned four factors. © 2013 © 2013 Hong Kong Society for Transportation Studies Limited.
Source Title: Transportmetrica A: Transport Science
ISSN: 23249943
DOI: 10.1080/23249935.2012.762564
Appears in Collections:Staff Publications

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