Operational Efficiency Evaluation of Intersections with Dynamic Lane Assignment Using Field Data

Table 3

Statistical description of the headway and nonparametric tests for several independent samples.

Intersection	Group	Sample size	Minimum (s)	Maximum (s)	Mean (s)	Std. deviation	Kruskal-Wallis test
								Sig. (p)
1	1	1483	1.08	7.57	2.397	1.088	115.340	0.000
	2	1836	1.08	5.09	2.001	0.582
	3	1382	1.05	5.57	2.101	0.719
	4	2216	1.08	5.17	1.985	0.515
2	1	1403	1.07	8.15	2.631	1.551	145.171	0.000
	2	1783	1.03	5.92	2.024	0.523
	3	1763	1.05	6.40	2.247	0.862
	4	3960	1.03	5.90	1.997	0.503
3	1	1512	1.09	8.39	2.722	1.328	449.283	0.000
	2	1908	1.06	6.59	2.068	0.688
	3	1676	1.06	5.98	2.302	0.943
	4	4262	1.05	5.41	2.006	0.532
4	1	1494	1.08	9.89	2.652	1.467	163.600	0.000
	2	1902	1.06	5.13	2.041	0.593
	3	1675	1.08	7.28	2.226	1.015
	4	2204	1.05	4.09	2.011	0.529
5	1	1180	1.09	8.88	2.605	1.282	256.159	0.000
	2	1857	1.08	6.56	2.032	0.601
	3	1476	1.08	7.59	2.254	0.884
	4	3380	1.04	5.19	2.031	0.531