Implementing FDWS(Fog Detect & Warning System) with LED Module Structure : Estimation of Safety Effects

• 영문명: Implementing FDWS(Fog Detect & Warning System) with LED Module Structure : Estimation of Safety Effects
• 발행기관: 한국방재학회
• 저자명: Lee, Suk-Ki Moon, Jae-Pil Jung, Jun-Hwa
• 간행물 정보: 『2. 한국방재학회 논문집』12권4호, 101~106쪽, 전체 6쪽
• 주제분류: 공학 > 기타공학
• 파일형태: PDF
• 발행일자: 2012.08.31

국문 초록

도로상의 운전자는 눈을 통하여 90% 이상의 정보를 취득한다. 하지만 안개로 인하여 전방 시야가 제약될 경우 운전자에게 치명적인 결과를 초래한다. 안개는 시간적, 공간적으로 빠르게 변화하는 특성이 있어 1~2개소에서 측정된 시정거리로 대다수의 구간을 예측하는 것에는 무리가 있다. 이러한 안개에 대한 대책으로 개별차량의 주행속도와 차두거리를 인식하고 대응할 여건을 제공, 안개시 사고발생 가능성을 줄여주는 안개도로 안전운전 지원시스템을 개발하였다. 본 시스템은 차량검지기, 시정계, 안개등, 메인컨트롤러 등 4가지로 구성되어 있다. 시정계는 안개 발생시 가시거리를 측정하고 안개등은 30 m 간격으로 설치되어 시정거리별 적정 휘도를 LED에 표출시킨다. 본 논문은 국도 37호선(파주-적성 1 km 구간)에 설치된 안개도로 안전운전 지원시스템에 대한 운전자 행태 및 효과 평가를 실시하였다. 운전자 행태 측정의 척도는 평균주행속도, 서면설문을 이용하였다. 결과적으로 시스템 설치 후 주간에는 3 km/h, 야간에는 10 km/h의 평균 감속도를 보였다.

영문 초록

Although drivers use various sensory channels to control and navigate their vehicles, they acquire most of all driving-related information visually. In fog, no matter what visual acuity is, the visual channel is useless due to the induced poor visibility. Drivers react differently to the adverse weather, resulting in high speed variation. That is why it has the high fatal rate during foggy conditions. Then, it is imperative to provide drivers positive guidance in fog. In this study, the Fog Detect and Warning System (FDWS), being called as the fog lighthouse, was conceived to inform drivers of safety speeds and distances between each vehicle. FDWS includes visibility meters, light bars, and vehicle detectors. The visibility meters calculate sight distances when fog occurs and the estimated sight distances inform drivers through the light bars which are installed at every 30m intervals. The light bars which display red warning lights inform a following vehicle of the position of the leading vehicle to keep the safety distance between the two vehicles. Since the main lights with the high-bright LED (Light Emitting Diode) have high visibilities, drivers can easily recognize far away. Also microwave sensors together with the light bars are installed to detect the presence of vehicles at every 30m intervals. The aim of this paper was to evaluate the effectiveness of the fog system on driver behavior and consciousness. As a pilot study, FDWS was implemented on a 1km section of National Highway No. 37 with a divided four-lane, rural highway. The analysis of the driver behavior was based on mean speed with standard deviation, and a questionnaire survey was conducted to estimate the driver consciousness. The results indicates that FDWS significantly led to an about 3kph (for daytime) and 10kph (for nighttime) reduction in mean speed compared to the system turned off. Also the consciousness survey shows that FDWS was useful helping drivers guide safely in fog.

키워드

안개도로 안전운전 지원시스템 시정계 안개등 평균주행속도 운전자 행태 FDWS(Fog Detect & Warning System) Visibility meter Light bar Mean speed Driver behavior