Evaluation of environmental sustainability of pavement preservation strategies using analytic hierarchy process

J. Farhan, T. Fwa
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Abstract

Pavement management involves satisfying goals that are often multiple and conflicting such as minimizing environmental, societal, economic impacts, and maximizing safety, level of service, condition etc., and cannot be achieved simultaneously. Decision makers are required to select a single maintenance strategy which closely meets their objectives and selection criteria. The set of criteria may  involve  economic  as  well  as  environmental  aspects,  some  of  which  may  not  be  easily quantifiable, thus requiring the use of qualitative judgments. Ranking approaches assign priorities to either distresses or maintenance treatments, and arrive at a maintenance program based on a selected set of criteria or preferences. A commonly used technique, in operations research, for prioritization of alternatives is known as Analytic Hierarchy Process (AHP). Its ability to embrace both quantitative and qualitative data through assignment of numerical values to qualitative data, and the significance of its role as a decision making tool for building a targeted model makes this the preferred method for prioritization. Therefore, this study explores the use of analytic hierarchy process (AHP) for prioritization of pavement rehabilitation treatments involving multiple criteria such as treatment cost, serviceability, and environmental implications. A Hypothetical numerical example is presented to illustrate the proposed framework for prioritizing 5 pavement rehabilitation techniques, namely, cold in-place (CIR), hot in-place (HIR) surfacing, hot in-place repaving, hot in-place remixing, and hot mix asphalt (HMA) overlay.
基于层次分析法的路面保护策略环境可持续性评价
路面管理涉及满足目标,这些目标往往是多重且相互冲突的,如尽量减少对环境、社会、经济的影响,最大限度地提高安全性、服务水平、条件等,并且不可能同时实现。决策者需要选择一种与他们的目标和选择标准密切相关的维护策略。这套标准可能涉及经济和环境方面,其中一些方面可能不容易量化,因此需要使用定性判断。排序方法为痛苦或维持治疗分配优先级,并根据选定的一组标准或偏好得出维持计划。在运筹学中,对备选方案进行优先排序的一种常用技术被称为层次分析法(AHP)。它通过将数值分配给定性数据来包含定量和定性数据的能力,以及它作为构建目标模型的决策制定工具的作用的重要性,使其成为优先级排序的首选方法。因此,本研究探讨使用层次分析法(AHP)来确定路面修复治疗的优先级,涉及多个标准,如治疗成本、可维护性和环境影响。本文给出了一个假设的数值例子来说明5种路面修复技术的优先排序框架,即冷就地(CIR)、热就地(HIR)铺装、热就地重铺、热就地再混合和热混合沥青(HMA)覆盖。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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