Abstract
The maintenance management decisions of network-level asphalt pavements have long been a challenge to highway agencies, and a great amount of factors have been involved. In this study, a network-level optimization method was established by integrating the maintenance benefits into the zero-one programming optimization model. An optimized performance evaluation method of asphalt pavement was proposed which contains 11 different kinds of combinations. The benefit model quantifies the cost savings of user travel time and vehicle fuel consumption to the pavement condition index (PCI) and ride quality index (RQI), respectively. Based on the simplified evaluation method as well as the quantified maintenance benefit model, an optimization model was established by employing the zero-one programming. This optimization model aimed to maximize the improvements/price ratio of pavement maintenance for the whole pavement network. The calculation results present the optimal strategies of maintenance for every road section in the network. The applicability of the newly proposed model was validated by a case study. The methodology developed in this study helps to offer guidelines to highway agencies in managing and making decisions about network-level pavement maintenance.
Highlights
IntroductionThe scale of highway networks in many countries has gradually improved, and they have or are about to face a major shift from the stage of “pavement construction as the main” to “pavement maintenance first.”
After decades of development, the scale of highway networks in many countries has gradually improved, and they have or are about to face a major shift from the stage of “pavement construction as the main” to “pavement maintenance first.”erefore, pavement maintenance and management issues have attracted more and more attention
E pavement performance evaluation is usually carried out in two aspects, namely, pavement structural and functional evaluations [3, 4]. e surface distress condition belongs to the structural condition evaluation, which consists of the structural bearing capacity [5]. e pavement functional evaluation includes driving quality, service level, and safety [6, 7]. e pavement performance can be evaluated with a single evaluation index or with a comprehensive evaluation index
Summary
The scale of highway networks in many countries has gradually improved, and they have or are about to face a major shift from the stage of “pavement construction as the main” to “pavement maintenance first.”. Different approaches and perspectives have been developed on the specific indicators and contents of pavement maintenance benefit calculation; for example, the World Bank defined the benefits of road projects into three aspects, namely, benefits arising from the saving in vehicle operating costs, saving in user time costs, and saving in traffic accident reduction. The benefits calculation of pavement maintenance projects in China at present mainly considers the benefits of operating costs reduction, the benefits of user travel time saving, the benefits of traffic accidents reduction, and the improvement of the quality of transportation services [13]. Is study proposes a network-level pavement maintenance and rehabilitation optimization model considering the costs of user travel time and vehicle fuel consumption. Based on the theoretical basis, a network-level optimization method considering road user costs was proposed and described in detail. A case study using the developed optimization method was shown
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