基于HCM2000延误模型的最佳周期时长估算公式

Optimal Cycle Length Estimation Equations Based on Delay Models of HCM2000

摘要:

提出了一套新的、基于美国道路通行能力手册2000版(HCM2000)延误模型的信号控制交叉口最佳周期时长估算公式.首先探讨信号交叉口最佳周期时长的理论计算方法，然后选取代表不同交通状况的典型交叉口,计算其最佳信号周期时长,以此作为样本数据进行回归分析,得到两个分别适用于两相位和多相位信号控制交叉口的最佳周期时长估算公式.该公式克服了久用的Webster最佳周期时长估算公式不适用于高饱和度交叉口的问题.

Abstract:

The paper presents a set of equations to estimate optimal cycle lengths for signalized intersections based on the delay models of Highway Capacity Manual 2000.Firstly,theoretic methods to calculate the optimal cycle length with minimum delays are proposed.Then optimal cycle lengths for sample intersections representing typical traffic situation scenarios are calculated.Two equations to estimate the optimal cycle length are developed respectively for two phase and multi phase signalized intersections through regression analysis.The new equations overcome the shortcomings of the famous Webster cycle length equation which is not applicable to intersections with high degrees of saturation.