在車輛行駛中，如何提升駕駛人的反應時間對於行車安全上相當重要。因此，本研究探討如何利用跟車行為的特徵來於線上估算駕駛人反應的延遲時間，作為描述駕駛人操控狀態的一項指標，未來更可提供安全系統設計的依據。當駕駛人跟車時若有剎車事件產生，則以估算線性系統延遲的面積法，估測駕駛人行車操控的延遲時間。無剎車事件時則透過皮爾森相關係數法找出相關的指標，利用跟車距離、時間間隔(Time-headway)來估算駕駛延遲時間。藉由實車實驗所收集的駕駛人操控數據，經統計後可驗證本研究估測延遲時間方法的合理性。

To increase the driver reaction time during driving events is crucial to enhance vehicle driving safety. In this research an algorithm to estimate driver time delay on-line is developed based on driver’s vehicle following behavior. During a braking event, the driver time delay is estimated using the area method and assuming that human behavior is modeled by a linear system with single time delay. When the braking event is not explicit, the relevant signals are analyzed using Pearson correlation coefficient. It is observed that the inter-vehicle range and the time headway yield high correlation with the forth-coming driver time delay when braking event occurs. Experimental recorded data verifies that the proposed method in estimating human driver time delay is reasonable.

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