在台灣地區，由於小客車數量與駕駛人數不斷增加，使道路狀況變得十分擁擠且不穩定，交通意外事故已成為國人十大死因之一。根據民國94年至今之肇事成因統計資料，酒後駕車每年皆高居我國交通事故成因第一位，然而我國對於酒精濃度的限制與英國、美國等先進國家相比，已經算是非常嚴格的標準，但酒駕肇事卻依然經常登上新聞版面，顯示酒後駕車問題之嚴重性與複雜性，值得深入探討與研究。
一般而言，酒後駕車多發生於深夜時段的交岔路口附近或是快車道，最常發生之事故類型與型態為車與車追撞，本研究擬以此類事故作為實驗設計之參考依據。
本研究係藉由駕駛模擬系統以虛擬實境技術建構出市區道路的場景，共招募十六位小客車駕駛者為實驗對象，探討在不同的呼氣酒精濃度(未飲酒與0.15mg/l、0.25mg/l、0.55mg/l)下，酒後駕車對駕駛者造成之影響。實驗過程詳細紀錄駕駛者對於道路突發狀況的感知反應時間、行駛路徑、碰撞次數、加減速度等數值，以供分析探討酒後駕車之駕駛能力與駕駛人特性之變化，進一步推論酒後駕車對交通安全的危害與影響。根據本實驗分析成果，可得知當駕駛者酒後開車上路時，不但反應較慢、控制較差，而且還會有暴衝、急停、左右蛇行等危險駕駛行為。雖然我們無法證明酒後駕車百分之百會發生肇事，但根據所分析之實驗數據可以說明，酒後駕車將提高肇事率，且當駕駛者之酒精濃度越高時，其肇事率也就會越高，故建議相關單位，加強宣導酒後駕車之危險性並訂定更嚴格的執法標準。

In Taiwan, traffic accidents have become one of the top ten leading causes of death. Due to the increasing number of automobiles, road has become much and much crowded. According to the statisics on cause of traffic accidents, drunk driving has been ranked the top cause since 2005. Even though the laws against drunk driving are much more strict than other developed countries such as England and America. But drunk driving accidents never vanish in our society. It really deserves to do further research which might give us a chance to avoid it happening again and again. We use the traffic accidents data base of Tainan city for our research and example. Drunk driving accidents frequently happened in the intersection area or fast lane in midnight.
This research uses Driving Simulation System to construct city road scene by Virtual Reality Technology. To investigate the effect upon drivers with different BrAC (no drinking, 0.15 mg/l, 0.25 mg/l and 0.55 mg/l), we recruited 16 drivers for our experiment. Drivers’ perception reaction time, route, collisions, and values of acceleration and deceleration with unexpected accidents were all recorded.
After this research was done, we can’t prove drunk driving will certainly lead to traffic accidents, but according to experimental statistics, drunk driving will raise the accident rate. The higher the alcohol consistency is, the more possibility the accident will happen. Thus, it’s better to set stricter standard.

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