擁擠是路網中常見的交通現象，也是用路人感受最簡易的反應指標，本研究嘗試探討於號誌化幹道上用路人之主觀擁擠感知。透過問卷設計結合習慣量表中之刺激、反應、穩定行為結果，分析用路人主觀心理感知；使用潛在遞變模式建構用路人路段時空因果關係，並結合劇變理論（Catastrophe），探究個體與群體用路人於時間與空間向度上行為之可能變化。最終探討訂定擁擠指標分級主觀感受外，亦能得知資訊可變標誌最適位置的設置，使擁擠指標資訊品質之提升，經由研究實測地點台15線與台北市路網驗證模式，並轉移模式至其它地區。 Traffic congestion is the most common phenomenon observed on the road network.It is also the simplest indicator to describe the traffic conditions. This study explores the subjectively perceived traffic congestion of the drivers on arterials. To analyze the cause effects of driver’s behavior upon the time and space dimensions, we apply one order SEM (structural equation model) plus Catastrophe theory. To make the outcomes reliable, some well setup methodology of habit questionnaire design is adopted. Not only can the quality of currently used congestion be significantly improved, but also the best locations of congestion information are found. Finally, to test the model transferability, two areas of route 15 and arterials in Taipei city are selected, followed by promising performance evaluation discussed in details.
