台灣地區公路系統歷經政府數十年之投資，在中山高速公路、第二高速公路及已編為省道之東西向十二條快速道路與西部濱海快速道路等陸續通車營運後，路網日趨完整，而公路工程亦從新建工程為主的型態，逐漸轉變為養護管理的層面。近年來，由於政府公共建設預算日益縮減，在面對財政困境下，道路主管機關勢必強化對於轄區內設施管理、提升工程效能等方面著手，方能在財政緊縮下維持公路運輸的品質並持續穩定的發展。 世界銀行(World Bank)於1968年開始對道路進行一連串專案研究以發展相關評估模組，於近年推出之HDM-4(Highway Development and Management)中，更提供了廣泛的模組應用與明確的方法於道路生命週期之計畫、規劃、準備以及操作等階段，提供了公路主管單位於進行相關決策時之參考。HDM-4此外提供了使用者針對於各地區之不同氣候、環境等因素進行相關參數調校之功能，以使本工具能夠適用於更廣泛的地區。在面對國內相關之路面維護管理體系尚未建構完整的情況下，如何藉由國際認可之工具進行國內公路系統養護管理的評估工作，應為可行且值研究的的方向之一。 本研究即利用世界銀行發展之HDM-4工具，收集彙整與分析國道三號關西工務段（42K?110K）路網資料、交通特性與成本相關資料，調整HDM-4道路劣化模式相關係數，建立台灣地區高速公路HDM-4本土化模組。另外，根據台灣地區目前養護現況與專家訪談結果，選定台灣地區適用之養護工法，並根據養護效益及特性進行道路工作影響模式之調整，以提供於後續分析之用。其後，利用校正後之本土化模式，配合高速公路預算編列情形實際進行例行性養護及週期性養護之門檻之推估，並考量養護成本、使用者成本及公路經濟觀念（淨現值、益本比、增量益本比等），進行最適化門檻探討。最後根據最適之養護策略，推求我國高速公路維護經費與維護績效間的關係，並利用此一結果，建議未來維護管理預算編列準則，以達到投出資源的最大經濟效益。 Taiwan Highway System experiences successively investment of few decades in government. After the first national highway-Chung Shan, the Second national highway, twelve west to east freeway and western seaside freeway go to operation, the road network is gradually complete. The road engineering change the style from new construction to maintenance management. In recent years, because the government public construction budget reduce year by year, so road agencies should be emphasizing facilities management and enhancing construction performance that keeping highway transit’s service quality with the constraints of budget limitations. World Bank carries on a series of project researches to the road in 1968 and develop the related evaluation module. In HDM-4, it provide the extensive module application and explicit method in the stages such as planning, programming, preparation and operation etc. It provide a reference that road agencies carry on related decision.. HDM-4 provide user to adjusting with different region parameter such as weather, environment…etc. So this tool can be applicable to more widespread region. When the related pavement maintenance systems are not satisfactory, how to use the international identify tool help Taiwan’s highway maintenance management. It is very interesting and workable research. We use HDM-4 to collect and analyze Guan-Xi region’s Highway No.3 network data, traffic characteristic and cost related information. Through this knowledge, we can adjusting the HDM-4’s parameter to suit Taiwan’s condition. Besides, we review technical literature and expert’s experience to determine on maintenance alternates. We use adjusted mode with real highway budget to determine the threshold of routine and period maintenance. Considering maintenance cost, user cost and highway economy to decide suitable threshold. Finally, base on the best maintenance strategies to explain the relation between maintenance budget and performance. Base on this result, we can determine the budget allotting criteria to reach the biggest economy benefit of the resource.
