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针对交通规划软件常用的BPR公交流量延误函数在饱和度接近或大于1时,计算值与实际值相差急剧增大的不足,提出一种锥形流量延误函数,并分析了其对公交行程时间的影响,进而通过等式关系实现模型在交通仿真软件EMME/3中的实用化。相关的案例分析显示,在公交行程时间拟合方面,锥形流量延误模型较传统的BPR曲线模型误差均值降低5.57%,误差的波动降低50.60%,效果显著。
Aiming at the shortcoming that the delay function of BPR traffic flow, which is commonly used in traffic planning software, when the saturation is close to or greater than 1, the difference between the calculated value and the actual value increases sharply. A cone flow delay function is proposed and its effect on bus travel time Influence, and then realize the practical application of the model in the traffic simulation software EMME / 3 through the equation relation. Relevant case analysis shows that the conical flow delay model is 5.57% lower than the traditional mean error of the BPR curve model and the error fluctuation is reduced by 50.60% in the bus travel time fitting, and the effect is significant.