http://www.thenewspaper.com/news/20/2071.asp

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"I can guarantee you it does not stay on green when you cross over
Timberland it does not stay on green more than three seconds," Shaw said.
"More than five seconds at the most. Maybe three cars get through then
all of a sudden you have to stop."

Although Texas Department of Transportation standards suggest the signal
should stay green for a minimum of eight to ten seconds, KTRE timed the
light at between three and five seconds of green. Shaw and others find
this to be an inadequate time to clear the intersection, and each time
someone fails to slam on the brakes in time, Lufkin will pocket $22.50,
the state of Texas takes $22.50 and German red light camera vendor
Traffipax earns $30. Officials say the timing results from programming
designed to optimize traffic flow during peak traffic periods.

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Although San Diego officials at the time insisted that "high accident"
intersections were the priority, not one of the top accident
intersections received a camera. Instead, the primary criteria actually
used were: short yellow times ("amber phase less than 4 seconds") and
"high traffic volume." San Diego rejected placement of red light cameras
in at least twelve intersections specifically because the "timing of
lights clears out traffic." This factor may describe a shortened green
scenario.

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