Madison Ave at 27th St, Granite, IL

Stoplight Data
Madison Ave at 27th St
Granite City, Illinois

Traffic Signal Timing

Yellow Time = 4.00 seconds

All videos measured same yellow light time.
120 frames @ 30 FPS = 4.00 ± 0.03 sec
-- 6 cycles recorded 2011 May 01.
-- 2 cycles recorded 2010 July 07.

Compressed Video - 10 sec @ 12 FPS

Frame 001 -- 00.08 sec GREEN
Frame 054 -- 04.50 sec YELLOW
Frame 102 -- 08.50 sec RED
Frame 120 -- 10.00 sec End

Intersection Parameters

Yellow Time: 4.0 sec

Speed Limit: 35 mph

Road Grade: 0 %

Stop-Clear Distance: 10 ft

Google Maps
Lat: 38.711171°, Long: -90.131949°

Red Light Cameras Madison Ave only.

Braking¹ = 0.53 g's
Unsafe-- Driver Max Braking²
1 -- Based on Average Reaction Time 2.3 sec.
2 -- See Braking Scale.

Driver Reaction Time = 2.3 seconds

Timeline and Distances
Speed (v) = 35 mph

C H A N G E S Y E L L O W	G O	d_y = 205 ft t_y = Yellow Duration = 4.0 sec				C L E A R
	B R A K E	React d_r = 118 ft t_r = 2.3 sec	Brake d_b = 77 ft t_b = 3.01 sec a = -0.53 g's	S T O P B A R	d_i = 10 ft
		React + Braking 195 ft 5.31 sec

Braking Summary
35 to 0 mph

Braking	=	0.53 g's
Deceleration	=	17.05 ft/s²
	=	11.63 mph/sec
Distance	=	77 ft
Time	=	3.01 sec

Driver Maximum Braking
Average Driver (0.45 g's),
Skilled Driver (0.65 g's)

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