Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.trc.2013.01.001
Title: Optimal subwork zone length and project start time for short-term daytime work zones from the contractor's perspective
Authors: Meng, Q. 
Weng, J.
Keywords: Non-differentiable optimization model
Traffic delay
Work strategy
Work zone
Issue Date: Apr-2013
Source: Meng, Q., Weng, J. (2013-04). Optimal subwork zone length and project start time for short-term daytime work zones from the contractor's perspective. Transportation Research Part C: Emerging Technologies 29 : 72-83. ScholarBank@NUS Repository. https://doi.org/10.1016/j.trc.2013.01.001
Abstract: To mitigate the negative traffic impact caused by work zones, land transport authorities usually impose constraints on queue length and travel delay. In reality, a single or multiple subwork zone strategy can be adopted to mitigate queue length and travel delay. However, contractors conducting work projects are only concerned with the minimization of the total maintenance cost. From the contractor's standpoint, this study proposes a total maintenance cost minimization model to determine the optimal subwork zone length and project start time, subject to queue length and travel delay constraints. Using average hourly traffic (AHT) data, this study shows that total user delay is non-differentiable with respect to the subwork zone length and project start time. This interesting finding demonstrates that previous analytic expressions of the optimal subwork zone length cannot hold for AHT data. To solve the proposed model, an enumeration method is designed. Finally, a numerical example created from the roadside tree trimming in Singapore is used to assess the model and solution method proposed in this study. © 2013 Elsevier Ltd.
Source Title: Transportation Research Part C: Emerging Technologies
URI: http://scholarbank.nus.edu.sg/handle/10635/59146
ISSN: 0968090X
DOI: 10.1016/j.trc.2013.01.001
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