In article >,
Ashton Crusher > wrote:
>Which is very similar to the studies showing increasing the yellow
>interval by a second or so greatly reduces red light accidents but
>cities WON"T do it because it ruins their photo red light radar
>justification.

Increasing the yellow time also takes away from the total amount of
green time in the intersection, resulting in more traffic congestion.
A traffic department that does not intend to set the yellow time
scandalously low still has the pressure to maximize the green time
at heavily used intersections to keep traffic flowing -- but it is
these heavily used intersections where commuters stuck in traffic may
be more prone to taking extra risks with the lights and running red
lights more often.

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Timothy J. Lee
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