隨著高齡化社會的來臨，高齡人口急速上升，這些高齡者由於視覺能力與認知機能的衰退，影響了使用產品的效率。然而，「道路交通標誌規則」行之多年，卻未因高齡化社會而予以更改，以致於行車反應力較一般人慢的高齡者在標誌的察覺上產生困難，而發生交通事故。顯見，設計師應了解高齡者身心上的需求，並遵循通用設計原則，改善現有的標誌提示形式，才能提高高齡者注意力，降低交通事故的發生。因此以人因工程方法進行交通標誌的改善與設計有其必要性。
本研究採實驗方式完成，分為前測與主要實驗部分，並以道路施工標誌做為研究對象。前測以問卷調查法探討高齡者的駕駛行為與對LED動態標誌的動態形式偏好；實驗部分以「標誌提示方式」、「行車車速」、「標誌內容」為獨立變項，而「反應時間」與「失事頻率」為相依變項，並透過flash軟體製作出虛擬行車場景，進行模擬駕駛實驗。
本研究結果發現，就車速而言，使用靜態標誌行車狀況下，反應時間依序為低速快於中速又快於高速，並在高速行駛時，失事頻率最高；在使用動態標誌時，低速與中速車速下，反應時間已無差異；而在使用動態加警示聲音標誌時，出現三速率不顯著的情形，且皆無發生失事情形。就標誌提示方式而言，大部分的結果呈現出，使用動態加聲音標誌的反應時間顯著少於使用動態標誌，又明顯少於使用靜態標誌；在高速行駛時，使用動態加聲音標誌的失事頻率顯著低於使用靜態標誌。希望透過實驗有效提升現有靜態標誌的察覺性問題，發展出適合高齡者使用之危險標誌提示方式，進而提供交通管理當局一個新的開發設計依循方向。

As the society aging, the elderly population has risen sharply. Since these elders’ visual abilities and cognitive functions have declined, it affects their efficiency in using products. However, the "rules of the road traffic sign" has been practiced for many years, and did not do any modification for the aging society. Elderly people, whose reactions in driving are slower than the average ones, have difficulties in reading traffic signs, and therefore, results in traffic accidents. Obviously, designers should understand the physical and psychological needs of the elders, following the principles of universal design to improve the existing displays of traffic signs. By doing this, the elders’ attention can be increased and the amount of traffic accidents will decline.
Therefore, it is necessary to use human factors engineering to improve and design traffic signs. Our research is done in an experimental way, divided into pre-test and the main experimental part. In addition, we aim at road construction signs as our object of study. For the Pre-test part, we use questionnaire survey method to explore the driving behavior of the elderly and the preference to dynamic LED signs dynamic forms. As for the Experimental section, we use "sign prompt way", "speed limit", and "mark content" as an independent variable, and the "response time" and "accident frequency" as the dependent variable. We also create virtual driving scenarios by flash software to make the simulation driving test.
According to the study, while using static signs, in terms of speed, drivers who are in low-speed cars need the shortest reaction time among the three groups. Divers who are in high-speed cars need more time to react than those who are in mid-speed cars. In addition, driving under high speed leads to the highest chances of having accidents. While using dynamic signs, there is no difference in reacting time between low-speed and high-speed drivers. While using dynamic signs along with signal voice at the same time, divers under three different speeds do not reveal evident differences in reacting time and none of these drivers have accidents. In terms of the sign prompt ways, most of the results show that shorter reaction time are needed for drivers when using dynamic signs along with signal voice than using dynamic signs only. While using static signs, drivers need the longest time to react among the three kinds of sign prompt ways. Moreover, the frequency of accidents in high-speed driving is apparently lower while using dynamic signs along with signal voice than using static signs.We hope that by doing this experiment, we can solve the existing problems of static signs and develop traffic signs suitable for the elders. Thus, provide the traffic management authorities with a new development design style to follow.

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