Abstract
Drive recorders capture driving data including video and vehicle acceleration signals in actual driving environments. Drive recorders function as witnesses of traffic accidents, as well as being utilized to reduce risky driving behavior and improve driver etiquette by providing feedback to drivers. Conventional drive recorders capture driving data when rapid acceleration or deceleration occurs. However, in addition to obviously hazardous situations such as these, there are many other hazardous situations which are not recorded using conventional methods. Although some newer models of drive recorders continuously record all driving data, the data is not fully utilized due to the volume of data. In this paper, we develop a driving diagnosis and feedback system which detects various hazardous situations, including excessive speed, ignoring a stop sign, and insufficient following distance, using a continuously recording drive recorder. The system also detects hazardous situations which can be detected by conventional event data recorders, such as sudden acceleration and deceleration. Our system provides feedback to drivers by showing them examples of their own risky driving behavior, using maps, videos, related driving signals, and it provides advice for improving their driving behavior. We recruited 33 drivers for the experiment, including six expert drivers. They drove the same vehicle three times, on three different days, following the same route, for a period of about an hour and a half. Drivers completed the route the first time just to become accustomed to the vehicle. Driver behavior was recorded the second time the route was driven. Feedback was provided to drivers before driving the course for the third time, and driving behavior was then recorded again. After providing feedback using our system, the number of detected hazardous situations decreased by about 50%.
Keywords: drive recorder, safety, driving diagnosis, feedback, human factor