[PRCo] Re: Stupid questions....

[Bill Robb]

--- John Swindler <j_swindler at hotmail.com> wrote:
> 
> Likewise, why do we need a yellow signal at an intersection.
> Think of all the money that could be saved with only a two
> aspect signal?
I seem to recall seeing many such in New York city in the late 1950s.
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I remember those too.  But they were still three aspect signals.  At the end of the green aspect the whole signal went dark for 5 seconds or so before the signal went red.


 
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