Chas Wrote:
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> I was involved in accident investigation for the
> Southern Pacific, but I never heard of any
> accident related to the signal mechanism being
> jammed. I do recall an accident wherein a signal
> maintainer turned a relay upside down when working
> in a signal box, which resulted in a head on
> accident when one train received a green aspect
> instead of a proper red signal, and entered a
> siding at speed that was occupied by another
> train.

El Monte, California, 1973.