Abstract:Rear-end collisions easily occur on freeway during heavy fog. This paper presents a cellular automaton traffic model for two-way intermittent release of freeway traffic during heavy fog to quantify the influence of various measures on traffic accident reduction. Simulations show that the rear-end collision probability,fa, is reduced with longer time intervals,ht between released cars in heavy fog conditions. Then, different speed limits have different critical time intervals,hmax. Intermittent release measures can guarantee that no rear-end collisions occur when ht>hmax. However, both fa andhmax increase as the fog zone area expands and with asynchronous release in the two lanes. Therefore, freeway management can effectively control the rear-end collision risk through adopting suitable intermittent release measures from this study.
谭金华, 石京. 浓雾下高速公路双车道间断放行措施[J]. 清华大学学报(自然科学版), 2016, 56(9): 985-990.
TAN Jinhua, SHI Jing. Two-lane freeway intermittent release measures in heavy fog. Journal of Tsinghua University(Science and Technology), 2016, 56(9): 985-990.
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