Research on Phase Combination and Signal Timing Based on Improved K-Medoids Algorithm for Intersection Signal Control

Table 4

Delay comparison of three optimization schemes in flow direction.

Time	Fixed phase			Vector angle			Optimized phase
	SS	SW	LE	SS	SW	LE	SS	SW	LE
7 : 00	14.44	23.89	35.57	20.66	45.82	37.62	15.91	28.88	27.28
7 : 30	29.81	24.04	40.20	21.35	53.38	41.17	29.82	24.05	40.19
8 : 00	22.74	23.61	32.67	29.84	55.28	44.68	22.73	23.62	32.67
8 : 30	35.35	20.92	39.16	27.55	55.99	50.72	29.18	26.45	30.31
9 : 00	12.21	25.20	34.72	11.79	31.85	29.78	14.92	30.91	21.41
Average	22.91	23.53	36.46	22.24	48.46	40.79	22.51	26.78	30.37