BRT安全适应性车速建模与分析

针对当前我国各城市快速公交运行速度差异较大,运营效果差别明显的问题,为提高BRT的运营效益及安全性,对BRT安全适应性车速进行界定,通过系统分析其影响因素,在不同隔离方式及交通条件下,分别基于操作稳定、制动安全及交通流量三方面建立BRT安全运行车速模型,利用VB编程实现模型的计算,最后通过实际运行数据与模型计算数据进行耦合分析,验证其可行性及鲁棒性。结果表明,理论安全适应性车速值与BRT实际运行速度特性耦合性较高,其差值为提高BRT运行效率提供理论参考。

Modeling and analysis on the safety adaptive speed of BRT

In view of the current problems that there was a huge difference in speed and operation effect of BRT in Chinese cities, in order to improve the operation efficiency and safety of BRT, BRT safe speed was defined, then through the systematic analysis of the influence factors, BRT safe speed model were established respectively based on stable operation, brake safety and traffic flow, in different isolation method and road conditions, and using VB programming to compute model, finally, coupling analysis had been done through computed data and field survey data to verify the effectiveness and robustness. Results show that the coupling is higher between the safe speed and the actual operation velocity of BRT, The gap between the theoretical value and actual value is a breakthrough point for improving the operational efficiency of BRT.