Estimating Safety Effects of Green-Man Countdown Devices at Signalized Pedestrian Crosswalk Based on Cellular Automata

Table 7

Simulation outputs.

Statistics		Scenarios				Overall
		1	2	3	4
Pedestrian volume (ped/h)		100	100	300	300
Vehicle volume (straight-through) (veh/h/lane)		50	100	50	100
Vehicle volume (left-turn) (veh/h/lane)		25	50	25	50
Vehicle volume (right-turn) (veh/h/lane)		25	50	25	50
Average velocity (m/s)	Non-GMCD	1.49	1.43	1.35	1.24
	GMCD	1.56	1.54	1.37	1.25
	Impact of GMCD	5%	8%	1%	1%	4%
Start to cross during last 10 s of green-man signal (%)	Non-GMCD	9.24	12.15	8.01	10.76
	GMCD	9.12	9.95	8.33	8.21
	Impact of GMCD	−1%	−18%	4%	−24%	−10%
Average velocity during last 10 s of green-man signal (m/s)	Non-GMCD	1.51	1.46	1.37	1.24
	GMCD	1.67	1.72	1.52	1.43
	Impact of GMCD	11%	18%	11%	15%	14%
Average DOC during green-man signal (with more than 10 s left)	Non-GMCD	0.003	0.002	0.006	0.002
	GMCD	0.003	0.002	0.005	0.002
	Impact of GMCD	−3%	0%	−12%	0%	−4%
Average TTC during green-man signal (with more than 10 s left)	Non-GMCD	2.33	2.79	3.04	3.28
	GMCD	2.32	2.7	3.21	3.4
	Impact of GMCD	0%	−3%	6%	4%	1%
Average DOC during last 10 s of green-man signal	Non-GMCD	0.008	0.003	0.002	0.004
	GMCD	0.003	0.003	0.001	0.003
	Impact of GMCD	−63%	−6%	−57%	−27%	−38%
Average TTC during last 10 s of green-man signal	Non-GMCD	2.21	2.57	2.81	2.93
	GMCD	2.03	2.32	2.73	2.73
	Impact of GMCD	−8%	−10%	−3%	−7%	−7%