Estimating the Effectiveness of Fog Detect & Warning System by Driving Simulator

Abstract

In a foggy day, visible distances depend greatly on the ever-changing concentration of fog. Most of chained rear-end collisions in a foggy day are caused by the significant differences in speeds between vehicles. Then, it is important to minimize the collisions in fog. This study is to estimate the effects of FDWS on drivers' safety behaviors by using a vehicle simulator and a questionnaire survey. A roadway section 1 km long with bidirectional 2 lanes was chosen for the estimation efforts. The test segment was from the Munsan to the Jeokseong county in National Highway 37. Scenarios associated with fog were set as heavy fog. Also, the distance between driver warning lamps was considered by 25 m and 30 m, respectively. The experiment conducted in this study employed the total of 31 adults who were randomly selected from 20-to 60-year old. Before performing the experiment, each subject had enough times to be familiar with the vehicle simulator and was instructed by the guideline of the experiment. After performing the main test, a questionnaire survey was undertaken for each subject.