過去由於工程建設在規劃、設計、施工、維護與拆除各階段未能重視永續的觀念，以致於環境遭受嚴重破壞，影響生態。隨著全球氣候變遷加劇，世界各國開始意識到永續發展之重要性，故各國政府無不重視在有限預算下，致力於資源分配合理性，避免過度浪費與造成環境負荷，減少天然資源耗費，已達節能減碳之目標。現階段政府在永續工程推動上，已有相關之指標與設計原則可供依循，然而對於公共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。因此本研究之主要目的在於針對道路工程的生命週期，探討各階段工程所採行之綠色材料、綠色工法、以及其他綠色作為之耗能與排碳量之計算模式，而後以耗能、排碳量與成本三者為目標，利用多目標評準之研究方法，建立永續工程生命周期之成本效益評估模式，而後利用案例分析與專家訪談方式進行試算與調整。希冀得以協助政府在辦理公共工程時，以最節約能源、最有效利用資源的方式且在最低環境負荷之情況下，達到人及建築與環境共生共榮、永續發展。 Energy saving and carbon reduction have become one of most important issues for environment protection and sustainability. However, the effort to achieve such work may be costly, not beneficial to practitioners. This research is to identify impact factors and to develop a quantitative technique for cost efficiency in dealing with road construction. There are three major aspects that this study are focusing on to estimate energy saving and carbon reduction – construction material, construction technique, and landscaping. Using multiple criteria measurement, the study can establish the quantitative model to estimate energy saving and carbon reduction for project life cycle. The evaluation lies in case study and expert interviews to adjust the model. The adjusted model expects to have contributions that will benefit not only for practitioners but for scholars. The finding is anticipated to yield an indicator showing how cost beneficial practitioners perform energy saving and carbon reduction on construction projects. 研究期間：9908 ~ 10007
