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为进一步预防和控制连续下坡路段交通事故,探讨其时空分布特征。针对连续下坡路段交通安全问题突出的特点,根据某高速公路典型连续下坡路段的交通事故统计资料、道路线形指标和交通量,分析该路段交通事故时空分布特征。采用相关性分析方法,探讨潜在影响因素与连续下坡路段交通事故时空分布的相关性。研究结果表明,在8∶00—10∶00时,小时事故率、死亡率和受伤率均达到最大;当连续下坡路段长度不超过3 km时,连续下坡对事故率、死亡率和受伤率基本无影响;随着路段长度的增加,合理地设置避险车道有助于减少事故率、死亡率和受伤率;但当路段长度超过9 km时,设置避险车道等防护措施对事故率、死亡率和受伤害率的影响均不明显。
In order to further prevent and control the traffic accidents on the continuous downhill section, the spatial and temporal distribution characteristics are discussed. In view of the prominent features of traffic safety on the continuous downhill section, the spatial and temporal distribution characteristics of traffic accidents on the section of the expressway are analyzed based on the statistical data of traffic accidents, the road alignment indicators and the traffic volume of a typical continuous downhill section of a highway. The correlation analysis method is used to explore the correlation between potential influencing factors and spatiotemporal distribution of traffic accidents on a continuous downward slope. The results showed that hourly accident rate, death rate and injury rate reached the maximum between 8:00 and 10:00. When the length of continuous downhill section did not exceed 3 km, the continuous downhill accident rate, the mortality rate and the injury rate But it will not be affected basically. With the increase of the length of the road section, the reasonable setting of the safe haven lane will help to reduce the accident rate, the death rate and the injury rate. However, when the length of the road section exceeds 9 km, The impact of death rate and injury rate are not obvious.