高速公路路侧标志设置问题

为了提高多车道高速公路内侧车道行驶的小车驾驶员视认路侧交通标志的准确率,运用概率论方法讨论路侧交通标志设置问题.建立路侧标志被大车遮挡的数学模型和算法,并提出连续设置路侧交通标志的方法和步骤为:决定标志设置位置,计算遮挡矩形长度,计算遮挡概率,决定连续设置标志个数和交通标志间的最小间距.计算结果表明:随着设置路侧标志的增加,驾驶员不能读取标志信息的概率呈指数下降.建立连续设置路侧标志的模型和方法简便,方案可行,可以解决多车道高速公路路侧标志的合理设置问题.

Setting problem of freeway side traffic signs

In order to improve the roadside-signs recognition accuracy of car driver steering along the inboard driveway of multilane freeway,the setting problem of freeway side traffic signs was studied with probability theory.The mathematical model and algorithm for the problem of the side traffic signs being blocked off by large vehicles are set up.The individual approaches and methods of setting side traffic signs in sequence are brought out,i.e.,to determine the location of side signs,to calculate the length of shelter rectangle,to calculate the shelter probability,to choose the number of side signs being set in sequence and to determine the minimal space between them.The computation results show that the probability of the driver being kept out of signs decreases exponentially with the increase of side signs being set in sequence.The established models and methods for setting side traffic signs in sequence are simple and feasible.It can solve the rational setting problem of side traffic signs in the freeway with multiple-lane.