Table 2.

Variable statistics.

Feature	Description	Count	Mean	SD	Min	Max
PET level	1, if 0.3 s < PET <  = 1 s	78,859	3.3	1.18	1	5
	2, 1 s < PET <  = 2 s
	3, 2 s < PET <  = 3 s
	4, 3 s < PET <  = 4 s
	5, 4 s < PET <  = 5 s
Distance (ft)	Spatial gap between two vehicles	78,859	13.98	1.53	0	15
red_clearance (s)	Red clearance time remaining at the end of each phase	78,859	0.2	0.76	0	4.9
all_red (s)	All red time remaining at the end of each cycle	78,859	0.02	0.22	0	3.9
Red (s)	Red time remaining	78,859	6.11	25.28	− 1	175.9
Yellow (s)	Yellow time remaining	78,859	0.01	0.61	− 1	4.9
Green (s)	Green time remaining	78,859	19.25	16.8	− 1	85.3
Phase 1	1, if phase is active, 0, otherwise	78,859	0.13	0.34	0	1
Phase 2		78,859	0.32	0.46	0	1
Phase 3		78,859	0.12	0.33	0	1
Phase 4		78,859	0.02	0.15	0	1
Phase 5		78,859	0.03	0.19	0	1
Phase 6		78,859	0.09	0.29	0	1
Phase 7		78,859	0.11	0.32	0	1
Phase 8		78,859	0.06	0.24	0	1
Speed (mph)	Current vehicle Speed	78,859	19.48	10.43	0	59.98
Heading (degrees)	Direction of travel	78,859	190.81	100.83	0	360
Lane	Lane information for any PET	78,859	28.3	10.31	3	35
Volume	Number of vehicles per 5 min	78,859	49.1	11.68	19	86
Intersection	1, if the vehicle is at intersection 0, otherwise	78,859	0.6	0.49	0	1
speeding_prop	$\frac{speed-speedlimit}{\mathit{speedlimit}}$ for leading vehicle	78,859	− 0.45	0.24	− 0.89	0.33
Movement	Location of the vehicle 0, left turning lane 1, through lane 2, at intersection	78,859	1.48	0.7	0	2