Group Gap Acceptance: A New Method to Analyze Driver Behavior and Estimate the Critical Gap at Multilane Roundabouts

Table 2

Summary of data collected.

Location		Al Gharrafa St. roundabout		Haloul St. roundabout		Combined
Classification	Type	Count	Percentage	Count	Percentage	Count	Percentage
Gap	Accepted	1025	44.55%	1112	46.66%	2137	45.62%
	Rejected	1276	55.45%	1271	53.34%	2547	54.38%
Vehicle type	Passenger vehicle	2210	96.05%	2262	94.92%	4472	95.47%
	Medium vehicle	62	2.69%	63	2.64%	125	2.67%
	Heavy vehicle	29	1.26%	58	2.43%	87	1.86%
Group gap	A	1860	80.83%	1652	69.32%	3512	74.98%
	B	118	5.13%	302	12.67%	420	8.97%
	C	205	8.91%	180	7.55%	385	8.22%
	D	23	1.00%	4	0.17%	27	0.58%
Individual gap	E	87	3.78%	239	10.03%	326	6.96%
	F	6	0.26%	5	0.21%	11	0.23%
	G	2	0.09%	1	0.04%	3	0.06%
Total		2301	100%	2383	100%	4684	100%