信号交叉口进口车道饱和流率估计方法

doi:10.13229/j.cnki.jdxbgxb20180752

Abstract

Abstract:

To accurately estimate the saturation flow rates of approaching lanes at signalized intersections, the headways obtained in peak hours are expressed by time series. The steady state test method is proposed based on PP test. The abnormal headways of the approaching lane during green time are deleted to obtain the saturation headways. The saturation flow rate is estimated using the average value of saturation headways. The three through lanes of a typical signalized intersection in Changchun city are taken as examples to validate the proposed method, and the method is compared with classical Highway Capacity Manual (HCM) method. The results show that the proposed method in this paper can estimate the saturation headways accurately; the estimated saturation flow rate ranges from 1700 pcu/h to 1900 pcu/h, which are higher than that of HCM method.

Key words: traffic and transportation systems engineering, saturation flow rate, time headway, steady state test, estimation method

CLC Number:

U491

Yi-ming BIE,Ru-ru TANG,Yun-hao WANG,Bin WEN,Tian-jun FENG,Lin-hong WANG. Saturation flow rate estimation method of approaching lanes at signalized intersections[J].Journal of Jilin University(Engineering and Technology Edition), 2019, 49(5): 1459-1464.

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k	T
k	25	50	100	250	500	∞
0.010	-3.75	-3.58	-3.51	-3.46	-3.44	-3.43
0.025	-3.33	-3.22	-3.17	-3.14	-3.13	-3.12
0.050	-3.00	-2.93	-2.89	-2.88	-2.87	-2.86
0.100	-2.63	-2.60	-2.58	-2.57	-2.57	-2.57
0.900	-0.37	-0.40	-0.42	-0.42	-0.43	-0.44
0.950	0.00	-0.03	-0.05	-0.06	-0.07	-0.07
0.975	0.34	0.29	0.26	0.24	0.24	0.23
0.990	0.72	0.66	0.63	0.62	0.61	0.60

k	T
k	25	50	100	150	200	∞
0.005	-3.72	-3.58	-3.47	-3.44	-3.42	-3.37
0.025	-2.98	-2.91	-2.86	-2.85	-2.82	-2.83
0.050	-2.64	-2.58	-2.55	-2.54	-2.53	-2.53
0.950	2.51	2.53	2.55	2.58	2.55	2.54
0.975	2.86	2.89	2.89	2.90	2.88	2.88
0.995	3.57	3.59	3.50	3.57	3.57	3.57

星期	车道6	车道9	车道12
一	304	206	250
二	290	192	248
三	282	190	231
四	284	182	223

参数	车道6	车道9	车道12
稳态检验前	304	206	250
稳态检验后	201	165	169
差值	103	41	81

车道编号	1~2 s	2~3 s	3~4 s	>4 s
6	39.6	42.2	12.5	5.5
9	51.0	37.8	10.2	1.0
12	32.0	45.2	12.4	10.4

Saturation flow rate estimation method of approaching lanes at signalized intersections

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