Branch signaling continued

[NW Mailing List]

Lynn,
You are on to something but yet, still incorrect. Remember this is CTC 
territory, Not only to signals indicate switch positions but also track 
conditions and so forth.

This said you need to remember that in figure 5 while YES the switch is 
lined for the branch BUT you have a train in the nearest block on the 
brach meaning the control point signal CANNOT display any signal more 
favorable then STOP or RESTRICTING.  This means that the signal one 
block back CANNOT display any signal more favorable then APPROACH.

Now say the train on the branch is in the next block away from the 
control point, then you would get an DIVERGING APPROACH (Take diverging 
route prepared to stop at next signal, etc...) at the interlocking then 
at that time you would get APPROACH DIVERGING one block back. Why the 
difference? Simple.

  The APPROACH DIVERGING only tells the engineer that he is taking a 
diverging route at the next signal so that he can bring his train down 
to the prescribed speed, but does not tell him to be prepared to stop.

The APPROACH tells the engineer to be prepared to stop at the next 
signal, this said unless the train involved has this new magic ability 
to stop in a mater of inches, there is no real way that the train would 
be exceeding the diverging route speed when he gets to the interlocking 
as he is thinking he will be stopping. If he comes up the the control 
point and volia he now has a DIVERGING APPROACH or DIVERGING CLEAR then 
simply knock the breaks off, of ease off the dynamics and take the 
signal, otherwise if you get the STOP, well your stopping...

Nathan
PS Jimmy, the valley just isn't the same since you retired, and Nauman 
retired just last week.
Ken, I'm in ham radio and have managed to run across a childhood friend 
of yours, Mark Bowers

Nathan Simmons
trainman51 at gmail.com
http://www.t-51.org
KI4MSK

On 11/7/2013 22:23, NW Mailing List wrote:

> for figure 5 the signal in question is about which way the switch is 

> thrown, its not an advance signal, so we have differrent thoughts on 

> this, well, its advance to the turnout, but neither indication is 

> intepreted as an advance signal indication, that would be a signal 

> previous.

> -Lynn-

>

>     ----- Original Message -----

>     *From:* NW Mailing List <mailto:nw-mailing-list at nwhs.org>

>     *To:* NW Mailing List <mailto:nw-mailing-list at nwhs.org>

>     *Sent:* Thursday, November 07, 2013 9:30 PM

>     *Subject:* Re: Branch signaling continued

>

>     Jim,

>     I believe that in Figure 2 the signal just before leaving the

>     branch should be a Diverging Clear (instead of Clear) showing that

>     it will be taking a diverging route, observing authorized speed

>     through the  turnout.

>     In Figure 5, the Blue train should have an Approach signal

>     prepared to stop at the next (RED) signal.

>     Jeff Sanders

>

>

>     On Thursday, November 7, 2013 12:05 PM, NW Mailing List

>     <nw-mailing-list at nwhs.org> wrote:

>     Sorry once again for the long pause.  I have updated my first two

>     diagrams based on the received feedback (please make sure I

>     interpreted correctly), and have added a few more cases to

>     examine.   Really need some help on Figure 5 as to whether the

>     blue train would see approach or approach diverging.

>

>     Inline image 1

>

>

>     Inline image 2

>

>

>     Inline image 3

>

>

>     Inline image 4

>

>

>     Inline image 5

>

>     Thanks,

>     Jim Cochran

>

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>

>

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