More on Interlocking signals
NW Mailing List
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Wed Oct 30 17:43:44 EDT 2013
Back before ditch lights, some trainmen referred to the Restricting aspect
as a "ditch light."
Grant Carpenter
> Date: Sat, 5 Oct 2013
>
> Jim:
> If I'm deciperhing this diagram correctly, the signal at the entring
> end of the siding is displaying an APPROACH DIVERGING. The
> bottom target shows three amber lights pointed toward the main.
> The center amber light shouldn't be there. Bear in mind that not
> all sidings were bonded and therefore couldn't detect if the siding
> was occupied or if there were track defects or a switch not properly
> line. For non-bonded sidings, the signal at the entering end of the
> siding would desplay RESTRICTING. On the Pittsburgh Division, the
> W&LE had a multitude of non-bonded sidings and maximum
> authorized speed to enter was 15 MPH. N&W's Safety Department
> ID'ed restricitng signals by noting that the diagonal signal on the
> bottom target point to the ditch and if you don't comply with the
> indication, the ditch is exactly where you're going. Harry Bundy
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