From the Library:  The Armey Report.

If you want to read more on the Dilemma Zone and why it was INTENTIONALLY CREATED to make RLC profitable.  Read this REPORT!

http://www.thenewspaper.com/rlc/reports/rlcreport.asp

http://www.thenewspaper.com/rlc/docs/finalreport.pdf

Quote:

The diagram above illustrates what happens when an automobile approaching an
intersection sees the yellow light. Drivers who are in the “Can’t Go” zone as the light turns
yellow know they are too far back and won’t be able to reach the intersection before the light
turns red—they must stop. Drivers who are in the “Can’t Stop” zone know they’re too close to
the intersection to stop safely—they must proceed. But when the yellow time is inadequate,
there is place in between both zones where the driver can neither proceed safely, nor stop safely.
Engineers call this the “Dilemma Zone.”

A properly timed signal will have enough yellow time that driver’s will never be faced
with the impossible choice presented by the dilemma zone. By determining the stopping and
clearing distances for a given approach speed, one can always calculate a safe yellow time that
offers drivers a safe option, by design, every time.

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