柔性鋪面依使用混合料級配和成分不同，包含較佳排水性及抗滑能力，並可減低行車噪音之多孔性瀝青混凝土(Porous Asphalt Concrete, PAC)及適合應用於重載交通路段和易產生高剪力的轉彎處之石膠泥瀝青混凝土(Stone Mastic Asphalt, SMA)。台灣地處於高溫、潮濕且多雨的亞熱帶氣候地區，夏季氣候高溫炙熱，且汛期長達7個月之久，常挾帶豐沛雨量。國內道路主管機關為提昇道路使用安全並改善鋪面永久變形、車轍、龜裂與剝脫等破壞現象，嘗試選用PAC及SMA取代密級配瀝青混凝土(DGAC)。本研究藉由現地檢測之車轍量、噪音值、CIV、透水量，鑽心試驗之力學性質，以及主辦機關提供平坦度、抗滑值及事故當量(EPDO)數據評估國道3號南投段與大甲段之PAC及SMA鋪面功能性、耐久性及安全性等績效。依據試驗結果和討論，PAC路段顯示抗車輛荷重能力佳、降低交通噪音、提升抗滑性、及維持長期透水性；另外，鋪築後之EPDO於南投段有遞減的趨勢，而於大甲段則無變化，長期績效仍需持續觀察；SMA路段之抗車轍變形能力佳及鋪築前後之CIV值皆高於70，顯現整體鋪面結構穩定。

Flexible pavement has better drainage and anti skid, which depends on the gradation and difference of the mixture used. The Porous Asphalt Concrete (PAC) also reduces he noise of driving and Stone Mastic Asphalt (SMA) applied to the section which has heavy-duty traffic and high shear corner. Taiwan is located in subtropical zones which the climate is high temperature, humidity and rainy. It has extremely high temperature during the summer and the flood season is continued for seven months. The competent authority used PAC and SMA to replace Dense-Graded Asphalt Concrete (DGAC) in order to improve the safety and decrease the damages of the road, for instance, distortion, rut, crack and exfoliation of the pavement. In this study used the rut, noise, CIV, MR and the IDT from the core test of mechanics also the data from the competent authority which provided the flatness, skid resistance and the EPDO to evaluate the safety, durability, functionality of the pavement on the national highway(No.3) between the Nantou section and Dajia section. According to the experiments and the discussion, the PAC section shows that it the loading capacity of vehicle is much better. It decreases the noise of traffic also improve the skid resistance and remain the water permeability. Additionally, the Nantou section which paving the PAC has decreased the EPDO but it doesn’t have the significant changes on the Dajia section. Therefore, it needs to observe consistently for its long-term utility. The SMA pavement has much better anti-rutting deformation performance and the CIV is higher than 70 after paving, it shows that the stable structure of the pavement.

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