摘要
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，运用驾驶员的视认规律、车辆到达规律和概率计算方法，建立了路侧交通标志遮挡问题的数学模型和算法。运用理论模型得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。计算结果表明：设置1～6块标志时，因遮挡驾驶员不能读取标志信息的概率为2．1×10^-1～9．4×10^-5，不能读取标志信息的概率随连续设置标志的数量呈指数下降趋势，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遮挡问题。
In order to improve the accurateness that car driver recognizes roadside signs on the inboard driveway of more-lanes freeway, the mathematical model and algorithm to deal with the blocking problem of roadside traffic signs were set up by using driver visiblity disciplinarian, vehicle arrival disciplinarian and probability computation methods, the individual approaches and methods for setting roadside traffic signs in sequence were obtained by the theoretical model, they were how to determine the location of roadside signs, calculate the length of blocking rectangle, calculate the shelter probability and choose the number of roadside signs set in sequence. The simulation result shows that the blocking probability varies from 2.1 ×10^-1 to 9.4×10^-5 when the number of roadside signs set in sequence varies from 1 to 6, the blocking probability exponentially decreases with the number increase that of roadside signs, which indicates that the established models and methods to set roadside traffic signs in sequence are feasible, it can solve the blocking problem of roadside traffic signs on freeway with more lanes. 2 tabs, 7 figs, 10 refs.
出处
《交通运输工程学报》
EI
CSCD
北大核心
2006年第3期97-102,共6页
Journal of Traffic and Transportation Engineering
基金
国家自然科学基金项目(50478071)
关键词
交通规划
高速公路
交通标志
数学模型
通行能力
安全设施
标志遮挡
traffic planning
freeway； traffic signs； mathematical model； highway capacity
safety device； signs blocking
