Estimation of Critical Gap Based on Raff’s Definition

Table 4

Critical gap comparison of various methods with different flow rates ( s,  s, , and ).

Order	(veh/s)		M3 definition	Ashworth	Raff	Revised Raff
			Equation (10)	Equation (3)	Equation (2)	Equation (8)
1	0.05	0.9	4.22	4.92	5.59	4.21
2	0.1	0.8	4.58	4.69	4.87	4.53
3	0.15	0.7	4.32	4.17	4.33	4.47
4	0.2	0.6	4.04	3.81	3.91	4.27
5	0.25	0.5	3.85	3.32	3.47	3.99
6	0.3	0.4	3.95	3.14	3.05	4.05
7	0.35	0.3	3.96	3.40	3.05	3.91
8	0.4	0.2	3.73	3.10	2.35	4.01
9	0.45	0.1	3.83	3.10	2.45	4.03