Over the past twenty－seven years, the hidden underground passages in Taipei have had a significant impact on the relationship between its residents and the city. The metro system, which originated with the implementation of restricted dining areas in 1996 and now consists of six lines, has become an essential component of urban life. It serves as a guiding principle for individuals, enabling them to measure distances, identify locations, and cultivate a collective awareness. 

「地理定位不再是關鍵，而是身體在特區內外的流動停留。踏進車廂的瞬間，身體與意識以一種速度姿態穿梭在顯示看板箭頭間的新世界中，由一群陌生人共享被格式、規律分化的時間。車門敞開，不論是繼續深遁或穿越地平，這裡交錯了台北的日常，也是超越時間的地方。

談到捷運或地鐵，對於當代各學門間似乎涵括一定的學理範疇，卻非限定於絕對視角，在工程與都市環境學門中，主體視角從基礎設施營造技術層面，延伸至交通導向（TOD）或都市設計等關於城市發展與治理的面向。對於關注都市空間的社會科學家而言，雖然面對捷運空間的看法仍有高度的分歧，但視其為一需要概念化的社會空間則為眾學派論證之基礎。

（全文請見《實構築季刊》19期）