近年來陸續有些道路工程碳排放量計算的研究，但通常都是列出一些碳排計算結果，如材料、運輸、機具等生命週期階段的碳排放，至於計算碳排所需資料的品質，即需要哪些資料，資料是否正確、完整，有何假設等，研究探討的並不多，如此前提未確定，所計算的碳排放量或有高低不同。
本研究分析工程碳排放資料並計算碳排，以道路工程為案例，藉由詳細價目表、單價分析表取得材料數量，提供廠商填寫碳排資料表以取得材料運輸、機具施工及用電用水資料，將價目表工項依性質分成11大項，採用碳排係數法計算各材料、運輸、機具、電水碳排，整理分析材料係數估算情況，比較耗油量及延噸公里兩方法計算的運輸碳排，依進度作業計算載具、機具碳排。
研究結果顯示，本研究找出材料工項的係數分為5種情況，有係數、推估、列入載具/機具、不計、無法計算，其工項金額分別占工程金額之 48.8、5.5、20.1、6.4、7.7 %。推估的組合材料有單純工料組合、工料經換算、含非材料工料3種情況，其中含非材料工料應列入載具/機具碳排，不計碳排的工項有單純人力、可重複使用設施儀器，及費用類3種情況。
案例工程碳排57,125.0 T，其中材料、運輸、機具、電水分別占81.6、0.7、16.9、0.7 %。大工項中，橋梁工程碳排36.9 %最高，道路工程30.3 %次之。運輸碳排以耗油量計算為423.1 T，延噸公里計算為701.3 T，延噸公里較耗油量計算高278.2 T、65.8 %。依進度作業分析機具使用，算出各作業碳排，其中作業1.6橋梁工程產生碳排4,755.9 T、49.2 %最高，全部機具中壓送車占2,910 T、30.1 %最高。
本研究系統化進行資料分析與計算道路工程碳排，整理工程碳排計算的問題，說明資料不足的處理方式，使碳排計算過程清楚，得出的碳排結果較容易驗證。

Recent studies on road construction carbon emissions often focus on life cycle results but overlook data quality issues like accuracy, completeness, and assumptions. Neglecting these premises can cause discrepancies in calculations.
Using a case study, this research derived materials from the Bill of Quantities (BOQ) and unit price analysis sheets, while contractors filled out carbon data sheets for transportation, construction equipment and utility data. Work items were divided into 11 categories. The study applied the Emission Factor Method, analyzed material emission factors, compared fuel consumption versus tonne-kilometer transport methods, and calculated vehicle and equipment emissions based on construction activities.
Results identified five coefficient scenarios: available, estimated, included in vehicle/equipment, excluded, and incalculable, representing 48.8%, 5.5%, 20.1%, 6.4%, and 7.7% of project costs, respectively. Estimated materials included simple, converted, and non-material combinations (the latter categorized under vehicle/equipment). Excluded items comprised manual labor, reusable facilities, and fee-based items.
By systematically analyzing road construction carbon emissions and addressing data deficiencies, this study establishes a transparent calculation process, rendering the results easier to verify.

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