"The red light camera program was introduced to the City in November 2003 and was implemented to reduce speeding and promote safety. The cameras have reduced red-light violations significantly. The City plans to increase the number of cameras within the next few years." Chicago Department of Revenue.
Frequency of Running a Red Light
Before & After Yellow Light Time Increased
Hoven's Index for April 1, 2010
Annual revenue from red-light cameras in Chicago: $59 to $64 million
Minimum yellow light duration suggested by the federal Manual on Uniform Traffic Control Devices: 3.0 seconds
Chicago's yellow light duration: 3.0 seconds.
Reductions in red-light running when yellow lights were made longer in controlled studies in Texas:
0.6 seconds more yellow: 49%
0.8 seconds more yellow: 70%
1.1 seconds more yellow: 79%
Estimated reduction in red-light-running by making yellow longer than 3 seconds: 50%
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