考量行車安全以及旅客上下車之安全，鐵路規章對月台與列車之相對淨空尺寸皆有規定，但是近年來現場施工經驗顯示，因鐵路規章對曲線月台建築界限淨空之規定，在施工值與完工後檢查之履勘值兩者分識不夠周全，以致於軌道舖設完成後，導致列車與外傾式曲線月台間隙增加，影響旅客上下車之安全。本文針對鐵路站場外傾式曲線月台淨空修正值之計算，提出加寬量建議計算式，計算符合實際需求之月台淨空修正值，供現地水平放樣。並以臺鐵汐科站及鼓山車站工程作為實例，使用鐵路規章及本文建議計算式分別計算月台淨空量，將計算結果加以比較討論，以提供曲線月台工程設計之參考。

The present paper discusses the construction gauge calculation of outward tilting for curved platforms of Taiwan Railways. The results of clearance correction formula derived by the Taiwan Railways Administration are insufficient to prevent the gap between the train and platform. In this paper, the clearance correction calculation procedure of outward tilting for curve platform is derived. The curve platform at Xike Station and Gushan Station of Taiwan Railway has been discussed. The results calculated by present procedure are compared with the results by using the formula from the Taiwan Railways Administration.