如何有效地降低交通肇事率及如何在交通事故發生之後，合理且公正地裁決交通事故的責任歸屬，一直都是令人關注的議題；尤其是如何降低交通事故的發生率以確保人民的生命財產安全。近年來，由於無線通訊技術與嵌入式系統的蓬勃發展，使得車用安全系統的實現變得不再遙不可及，而如何運用上述的技術來有效地減少交通肇事率及記錄交通事件，則是變成令人感興趣的研究主題。
本篇論文主要是提出一個以Dedicated Short Range Communication (DSRC)為基礎的行車安全警告系統及車輛行車記錄器。行車安全警告系統是透過一系列的Cooperative Collision Warning (CCW) 應用程式，包括縱向安全警告系統、側向安全警告系統、及緊急狀況警告系統，希望能為用路人提供全方位的行車警告系統，而達到降低車禍發生率的目標。在車輛行車記錄器的實現上，主要是在行車安全警告系統執行期間，將所搜集的交通資訊儲存下來，其中包括自身車輛及鄰近車輛的資訊，用來記錄車輛自身及周遭的狀況，以提供事後的現場重建及責任歸屬判斷。
為了驗證上述之行車安全警告系統的效能及車輛行車記錄器的現場還原功能，本實驗室發展一個交通和無線網路的模擬器—HiTSim (Highway Traffic Simulator)，將本篇論文所設計的CCW應用程式實作於HiTSim之上，用以論證本行車安全警告系統對於交通事故之影響，及無線網路之可靠度對於交通事故與行車安全警告系統的關係。車輛行車記錄器則是將行車安全警告系統的交通資訊重新在HiTSim之上。根據實驗的結果，本論文中所提出的行車安全系統能有效地減少交通事故的發生率及完整地記錄下車輛周遭的交通狀況。

How to lower the incidence of traffic accidents efficiently and how to judge the responsibility of traffic accidents reasonably are very important issues recently. Especially, it is the most important of how to reduce the number of traffic accidents to save the lives and property of the public. In recent years, the advancement of wireless communication and embedded system make the realization of vehicular safety system possible. Furthermore, how to utilize these technologies to reduce the possibility of traffic collisions and record the traffic events is a very interesting research topic.
This thesis proposes a cooperative collision warning system and motor vehicle event data recorders (MVEDR) based on dedicated short range communication (DSRC). There are including a series of cooperative collision warning (CCW) applications in the safety system, such as longitudinal warning system, lateral warning system, and emergency warning system. The ultimate goal is to provide a full direction safety system for drivers and lower the incidence of traffic accidents. The MVEDR is used to record these traffic information, including self vehicle and other vehicles, while the execute period of CCW. These recorded traffic information can be used to keep track the surrounding situation and rebuild the scene of a traffic accident.
In order to validate the performance of CCW system and functionality of MVEDR, we develop a traffic and network hybrid simulator – HiTSim (Highway Traffic Simulator) and implement the CCW system and MVEDRs on the HiTSim. The simulation of CCW system is used to verify the relationship among the reliability of wireless network, traffic collisions, and CCW system. The functionality of MVEDRs is to record the traffic situation on HiTSim. According to the simulation results, the CCW system can reduce the incidence of traffic collisions efficiently and the MVEDRs can record the surrounding traffic situation.

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