隨著國內高速鐵路營運、各都會區捷運系統啟用及運輸市場改變，臺灣鐵路管理局(以下稱臺鐵局)的角色正面臨轉型，因此「臺鐵捷運化」是目前持續進行的過程，其目的在於提升區域運輸服務，以達整體運輸系統整合。
為符合臺鐵捷運化之目標，在路線上新增數通勤車站並加開通勤列車，惟臺鐵局係屬快慢車混合經營且停站方式複雜之軌道系統，而施工計畫內容對於捷運化後的路線容量評估卻相當少見，因此，本研究將進一步分析臺鐵捷運化後路線容量之變化及可能提升路線容量之方法。
軌道路線容量係國內外學者、學術單位反覆研究的議題，在研究的方法上常見有班表壓縮法、數學規劃法及電腦模擬法，各方法都提供相當重要的資料及基礎，惟影響路線容量的因素眾多，應全面考量軌道系統列車種別、車站及站間相互影響的可能，以求結論接近事實。
因此，本研究在方法上以具備彈性、平行運算能力之模糊派翠網(Fuzzy Petri Nets)作為推論引擎，參考鐵路局行車規章並以從業人員的角度編寫知識庫以建構「軌道路線容量評估模組」，針對「臺中計畫」加以分析，提出臺中計畫通勤車站啟用後最適列車種組合及平均發車間隔，以及捷運化後軌道系統與系統中各節點的連動關係，希望能作為臺鐵局對於捷運化區間加開列車及施工單位設計之參考。

The policy of “Rapid Transit Systematization” has been executing for Taiwan Railways Administration(TRA)which is a traditional railroad .The subject of policy is making TRA underground or elevated and aims to integrate railway systems into a regional transport system, most important of all,the policy is building new Commuter Rail Stations in the line. The aim of this study is to analyze the the capacity of “Taichung Project” of the policy.
The capacity of railway transportation system is critical to the service quality and the railway capacity is not easy to analyze. Difficulties include the numerous interrelated factors about human,the complex structure of the railway and the vehicles. Therefore a tool that deals with these factors must be flexible. Thus, the method this study employed is Fuzzy Petri Nets (FPNs) which is flexible. FPNs is composed of Fuzzy Logics and Petri Nets, so it is not only flexible, but also could deal with uncertainty.This study proposed a tool named “railway capacity evaluation module” could solve the problems of the railway capacity.
This study described that the Taichung Project would not be the same as TRA Taipei corridor because the numbers of the station tracks in the Taichung Project are lesser than TRA Taipei corridor.

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