政府在永續工程推動上，目前對於道路工程所導入之各種永續概念該如何評估其成本效益並無一套完整之評估模式，以衡量道路永續工程內涵與經濟成本關係，故建立道路永續工程之成本效益評估模式是現階段之關鍵課題。本研究之主要目的在於接續前期之重要文獻回顧針對道路工程生命週期規劃設計階段，建立影響成本與效益之評估因子、量化影響程度並訂定權重，最後以永續工程內涵之效益與經濟成本進行分析探討，並提出成本效益評估模式。研究方法由蒐集國內外永續工程相關文獻，了解永續道路工程於規劃設計階段所需考量之面向，初步彙整道路永續工程內涵影響經濟成本與效益因子，而後透過深度的專家訪談確立22個影響成本與效益之因子，並依李克特氏(Likert)量表評分設計問卷發放200份問卷於永續與道路工程專家進行調查，並預計達80%之問卷回收率。影響成本之因子由問卷結果進行多變量分析之因素分析法（Factor Analysis），並以各指標之因素負荷量作為權重訂定之準則；而影響道路永續內涵效益因子以層級分析法（Analytic Hierarchy Process, AHP）訂定指標之相對權重，最後再以簡單加權法（Simple Additive Weighting, SAW）來建構此評估模式，最後由各權重，進行成本效益分析（Cost-Benefit Analysis, CBA），應用益本比之概念建立初步評估模式，希冀未來亦可利用此研究成果導入案例進行分析。Sustainability has become one of most important issues for road engineering in considering environment protection. However, the effort to achieve such work may be costly, not economically beneficial to engineering practitioners. This research is to identify cost impact factors through a nationwide survey and then to determine their corresponding weights for road engineering projects. The impact factors are initially gathered from literature review and expert interviews, resulting in a total of 22 factors for the survey. 200 questionnaires will be spread out, expecting 80% or more effective samples returned. The factor analysis and analytic hierarchy process method (AHP) will be used to explore significant factors and their corresponding weights. Followed by the use of the Cost-Benefit Analysis (CBA) concept, we accordingly form a model that provides cost-benefit efficiency for the sustainable road construction. The finding is anticipated to benefit practitioners in the designing, planning, budgeting, and controlling phases of road engineering projects. The study in the next turn will focus on applications and case studies for the model. 研究期間：10008 ~ 10107
