內湖線行車監控系統採用加拿大Bombardier公司之CITYFLO 650系統，此系統係以通訊方式來完成行車監控功能，即一般所稱之CBTC(Communications Based Train Control)，列車安全間距係採用移動式閉塞區間(Moving Block)之架構。由於內湖線係國內首次採用CBTC之大眾捷運系統，又內湖線為木柵線之延伸路線，為達到內湖、木柵線「一車到底、無須轉乘」之運轉需求，未來木柵線之行車監控系統，將配合內湖線工程予以更新。故未來在內湖線完工後，馬特拉公司在台北木柵線的號誌系統將同時走入歷史。在此希望藉由本文之介紹，讓讀者對未來內湖線採用之CBTC行車監控系統，能有概括之認識。

The CITYFLO 650 system developed by Bombardier Inc. is adopted in the Neihu line's Automatic Train Control (ATC) system. It is a driverless system and operated through a system commonly referred to as a Communications Based Train Control (CBTC) with moving block to keep the safety separation between train runs. Since the Neihu line, an extension of the Muzha line, is the first mass rapid transit system in Taiwan to adopt CBTC, the Muzha line’s ATC system will be also retrofitted so as to be in line with the Neihu line, in order to fulfill the operational requirement of "one train no transfer" of the Neihu & Muzha lines. After the completion of the Neihu line, the MATRA signaling system of the Muzha line will become a part of history. Through the following introduction, readers will be enlightened and have a general idea of the CBTC ATC system that will be adopted on the Neihu line in the future.