路口有行車管制號誌來減少交織衝突，但設有行車管制號誌的交叉路口仍為許多事故發生的地點，且駕駛人違規肇事件數亦有逐年上升的趨勢。在部份路口夜間時段因通行車流減少，正常號誌管制反造成行駛車流延滯，轉為改以閃光號誌提醒夜間用路人提高警覺小心通行，但肇事嚴重程度仍然高於行車管制號誌路口，由此可知，無論有無法令限制或其它交通管理手段，駕駛人的行為是造成交通事故最重要的關鍵因素。

為了避免駕駛人因做出錯誤決策造成不必要的生命財產損失，有必要進一步深入探討駕駛人是依照那些因子來判斷做出決策，再針對此些因子提出改善方案，讓駕駛人不致做出錯誤決策，以達到提升交通安全的目標。

本研究針對駕駛行為的判斷決策進行分析，經由廣泛的文獻回顧找出顯著影響駕駛人判斷決策行為的因子，包括:人、車、路及環境等構面。過去缺乏閃光號誌路口之相關研究，故將研究場景設定為閃光號誌路口，經過模擬實驗以探討駕駛人面臨左右穿越車輛下的加速、等速、減速甚至停等的決策判斷。

依據駕駛模擬道路實驗所得到的資料進行風險分析，以了解本研究所挑選的因子對夜間閃光號誌路口交叉撞肇事風險之影響，並針對風險分析結果進ㄧ步提出風險管理芻議，以供交通管理單位作為改善方案之參考。

Signalized intersections were often accident areas. Although traffic signals controlled vehicle conflicts, the numbers of violation accidents still increased yearly. The accident severity at flashing signalized intersection would be higher than that at signalized intersection. According that, whether traffic rules or other traffic management methods existed, driver behavior would be a critical factor.

The study would explore drivers made decision judging by what factors were, and further, to improve traffic safety and avoid drivers making incorrect decisions. The study utilized literature review to explore what factors affected drivers’ decision. In the past, these researches about flashing signalized intersections were less. Therefore, designing virtual road crossing experiment to explore drivers’ decisions （acceleration, deceleration, stop）when drivers would cross flashing signalized intersections.

At last, using risk analysis to process these data to understand how these factors affected risk values on crossing crash at flashing signalized intersections, and recommending risk management comments for traffic management organization.

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