Abstract
Purpose The purpose of this paper is to perform fine classification of road traffic visibility based on the characteristics of driving behavior under different visibility conditions. Design/methodology/approach A driving simulator experiment was conducted to collect data of speed and lane position. ANOVA was used to explore the difference in driving behavior under different visibility conditions. Findings The results show that only average speed is significantly different under different visibility conditions. With the visibility reducing, the average vehicle speed decreases. The road visibility conditions in a straight segment can be divided into five levels: less than 20, 20-30, 35-60, 60-140 and more than 140 m. The road visibility conditions in a curve segment can be also divided into four levels: less than 20, 20-30, 35-60 and more than 60 m. Originality/value A fine classification of road traffic visibility has been performed, and these classifications help to establish more accurate control measures to ensure road traffic safety under low-visibility conditions.
Highlights
Adverse weather conditions cause serious harm to road traffic safety, especially under low-visibility conditions related to fog
3.2 Descriptive statistics The driving behavior characterizations studied in visibility classification experiment were speed and lane position
The variable of lane position referred to the distance between vehicle and road centerline
Summary
Adverse weather conditions cause serious harm to road traffic safety, especially under low-visibility conditions related to fog. The low-visibility conditions severely affect drivers’ line of sight, which leads to a lack of accurate judgment of road geometry information and the real-time traffic flow state (Clark et al, 2004; Li et al, 2015). Statistics shows that approximately 600 fatalities and 16,300 injuries occur each year in fog-related crashes (US Department of Transportation, 2009). The traffic safety situation under low-visibility conditions is very serious in China. According to the China Road Accident Statistics Annual Report, 106,047 traffic accidents occurred in visibility lower than 200 m in China during 2015, leading to the deaths of 34,006 people, accounting for 58.61 per cent of all
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