Red Light Camera Studies Roundup
A collection of red light camera studies over the last decade shows red light cameras have serious side-effects.

Over the past decade, a number of studies have examined the use of red light cameras. The most relevant studies examined the devices in light of changes in traffic and engineering conditions made at intersections during the study period and pulled actual police reports to examine the particular causes of each collision. The following studies are the most comprehensive available.....

**	A 2005 Virginia DOT study found: "The cameras are correlated with an increase in total crashes of 8% to 17%." Read a summary Full copy:1.7mb pdf
**	A 2004 North Carolina A&T University study found: "Our findings are more pessimistic, finding no change in angle accidents and large increases in rear-end crashes and many other types of crashes relative to other intersections." Read a summary Full copy: 1.7mb pdf
**	A 2003 Ontario Ministry of Transportation study found: "Compared to the average number of reported collisions occurring in the before period, the average yearly number of reported collisions increased 15.1 per cent in the after period." Read a summary Full copy, 1.5mb pdf
**	A 1995 Australian Road Research Board study found: "The results of this study suggest that the installation of the RLC at these sites did not provide any reduction in accidents, rather there has been increases in rear end and adjacent approaches accidents on a before and after basis and also by comparison with the changes in accidents at intersection signals." Read a summary Full copy, 2.4mb pdf
**	A 1995 Monash University (Australia) study found: "a simple correlation analysis was undertaken for red light running data in the current study and revealed no significant relationship between the frequency of crashes at RLC and non-RLC sites and differences in red light running behaviour." Read a summary

Related Reports and Studies

The importance of the yellow warning signal time in reducing the instances of red light running is found in the following reports:

A 2004 Texas Transportation Institute study found:
"An increase in yellow duration of 1.0 seconds is associated with a [crash frequency] of about 0.6, which corresponds to a 40 percent reduction in crashes."
Read a summary
Full copy, 1.5mb pdf

A 2001 report by the Majority Leader of the U.S. House of Representatives found:
"The changes in the yellow signal timing regulations have resulted in the inadequate yellow times. And these inadequate yellow times are the likely cause of almost 80 percent of red light entries."
Full version with summary

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