【摘要】 隧道路段特殊的道路环境是隧道路段事故频发的诱因。为了更好地为隧道的路线设计与速度管理服务,首先分析了高速公路典型隧道路段试验车的行驶速度数据,研究了隧道路段的运行速度变化,得到了车速变化的规律。结果表明中短隧道对车速影响不大,长大隧道路段车速变化较为明显,车辆行驶过程可以分为调整-稳定-恢复3个阶段,并确定其中6个点作为运行速度特征点,即隧道前200 m、隧道进口、隧道进口内300 m、隧道出口前300 m、隧道出口前100 m、隧道出口外100 m。进而通过大量的数据调查,利用统计回归方法,建立并验证了特征点的运行速度模型。更多还原

【Abstract】 The special environments of tunnel induce to high frequency of accidents.To serve the route design and speed management of the tunnels better,based on analysis of the operating speed data in the typical tunnels of expressways,the regularities of the speed variations in tunnels were explored.It is concluded that(1) middle tunnels and short tunnels have little influence on speed;(2) speed changes remarkably in long and extra-long tunnels,in which the driving process can be partitioned into adjusting,steady and resuming phases.Six points were selected as inflexion points of operating speed,which located at 200 m forward of the tunnel,the inlet,300 m backward of the inlet,300 m forward of the exit,100 m forward of the exit and 100 m backward of the exit.Then the models of operating speed on inflexion points were built based on large number of surveyed data and statistical regression,and validated by field data.更多还原