Signals at interlockings part 2

NW Mailing List nw-mailing-list at
Tue Aug 13 18:07:13 EDT 2013

I'm assuming intermediate signals are "intermediate" to interlockings, so
is this another way of saying block signals or are there other nuances?
Jim Cochran

On Tue, Aug 13, 2013 at 2:24 PM, NW Mailing List
<nw-mailing-list at>wrote:

> On 8/13/2013 11:21 AM, NW Mailing List wrote:


> For an Eastbound train approaching this bracket on the main, the normal

> block aspects are needed (clear, approach and *stop and proceed*) to give

> information about subsequent block occupancy. Since this train is

> physically constrained to proceed along the main, no diverging aspects are

> needed, but since a Westbound train could be approaching to enter the

> siding, the stop and stay aspect is needed.


> Jim,

> You can't do that. Only intermediate signals can be stop and proceed.

> So, this has to be a Stop signal.


> Jimmy Lisle


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