Serge NOEL
322 lines
14 KiB
Plaintext
322 lines
14 KiB
Plaintext
<!DOCTYPE html>
|
|
<html lang="en">
|
|
<head>
|
|
<meta name="generator" content="HTML Tidy for HTML5 for Apple macOS version 5.8.0">
|
|
<!-- Copyright ($Author: ken_c $) 2010 -->
|
|
|
|
<title>JMRI: BN-1989 Signaling Definition</title>
|
|
<!--#include virtual="/Style.shtml" -->
|
|
</head>
|
|
<body>
|
|
<!--#include virtual="/Header.shtml" -->
|
|
|
|
<div id="mBody">
|
|
<div id="mainContent" class="no-sidebar">
|
|
|
|
<h1>JMRI: BNSF-1996 Signalling Definition</h1>
|
|
This system contains signalling definitions corresponding to the BNSF Railway (Burlington
|
|
Northern and Santa Fe Railway) rules as described in the BNSF all subdivisions System Special
|
|
Instructions. In effect at 0001 Central, Mountain and Pacific Continental Time, Thursday
|
|
August 1st 1996.
|
|
<p>Signal aspects can be referenced on page 2 of the 1996 special instructions here:-</p>
|
|
|
|
<p><a href="https://fobnr.org/wp-content/uploads/2018/07/SI-01-080196.pdf">Special
|
|
Instructions 1996</a>.</p>
|
|
|
|
<p>Not all of the possible masts have been defined but there is a varied selection here that
|
|
should cover most requirements. Due to the nature of this being a simplified prototype system
|
|
it is not always easy to display all the possible variations of the same aspect on a mast and
|
|
this should not be necessary in most cases. Where a mast can display different variations of
|
|
an aspect (e.g. Diverging Clear or Diverging Approach) the lower aspect will apply to any
|
|
diverging route with a slow speed restriction.</p>
|
|
|
|
<p>It is assumed that semaphore signal arms cannot display flashing indications and cannot
|
|
display Lunar aspects.</p>
|
|
|
|
<p>It is also assumed that searchlight heads can only display a maximum of three different
|
|
colours on an individual head.</p>
|
|
|
|
<p>Some of the possible distant aspects (any approach aspect requiring multiple or flashing
|
|
heads) were not explicitly defined in the initial 1996 rules 9.1.1 and 9.1.2, but have been
|
|
included on some distant masts because they are made available under later revisions of the
|
|
rules. The single arm semaphore distant does comply fully with distant rules 9.1.1 and 9.1.2
|
|
so you can use that if required to generate the correct signalling sequence for early
|
|
installations for both semaphore and searchlight signals.</p>
|
|
|
|
<p>No one mast can display all of the available aspects so check carefully which aspects you
|
|
require before choosing a mast.</p>
|
|
|
|
<p>Some aspect sequences can be controlled by setting appropriate speeds on blocks. A 'Sixty'
|
|
speed block will cause a signal to be proceeded by an Approach Limited indication in most
|
|
cases, a 'Fifty' speed block Advance Approach and a 'Medium' or 'Slow' speed block Approach
|
|
Medium. A Slow speed block on a divergance will force the lower head to display Diverging
|
|
Approach and Diverging Clear indications on a triple head/arm mast instead of the centre head
|
|
where available, and a Restricting speed block will force a restricting or Restricting
|
|
(Diverging) indication where possible.</p>
|
|
|
|
<p>An additional non-flashing icon set has been provided for where the flashing icons cause
|
|
display problems. Choosing the non flashing representations does not affect the aspect
|
|
displayed on the physical signal. Right click on the signal icon when editing the panel to
|
|
select the alternate icon set for that signal.</p>
|
|
|
|
<p>Not all aspects described under a particular rule are fully interchangeable with one
|
|
another since they contain slightly different meanings not fully described in the rules. Rule
|
|
9.1.6 (Approach medium) for example has both a family of flashing yellows and a family of
|
|
double yellows. The double yellows signify that the next signal will indicate diverging while
|
|
the flashing yellow generally indicates that the next signal is an approach signal. From a
|
|
driver's point of view of course they mean the same, but if modelling the prototype the
|
|
continuing historical differences in use are of note.</p>
|
|
|
|
<p>Some indications appear in the aspects list several times. In this case there is a
|
|
seperate entry for each of the possible prescribed speeds that the aspect may apply to in
|
|
order to get the preceeding signal to display the correct aspect. On a diverging route the
|
|
signal aspect may be determined by the state of a signal some distance ahead and not just the
|
|
next signal.</p>
|
|
|
|
<p>Track speeds used in this system are Sixty = 60 MPH, Fifty = 50MPH, Medium = 30 MPH, Slow
|
|
= slower than Medium and Restricted = Restricted speed. Use the Sixty speed where Limited
|
|
speed is required - do not use Limited because that refers to a slower speed used by other
|
|
signal systems. Use Slow speed where a divering route is the secondary diverging route to
|
|
force the correct aspects to be displayed where alternative aspects are available on a triple
|
|
head/arm mast.</p>
|
|
|
|
<p>Typical sequences of aspects shown by this signal system :-</p>
|
|
|
|
<p>Semaphore signals leading through a consecutive divergance. The triple arm signal is
|
|
located at the first divergance:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-2-high/rule-9.1.5-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-2-high/rule-9.1.6-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-3-high/rule-9.1.10-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-2-high/rule-9.1.9-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SE-1-high/rule-9.1.3-a.gif" alt=
|
|
""></p>
|
|
|
|
<p>Searchlight signals leading through a consecutive divergance. Again the triple head signal
|
|
is located at the first divergance:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.6-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.6-b.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-3-high/rule-9.1.10-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.9-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""></p>
|
|
|
|
<p>Searchlight signals leading through a single secondary divergance:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.6-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.6-b.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-3-high/rule-9.1.9-b.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""></p>
|
|
|
|
<p>Searchlight signals leading through a single primary divergance:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.6-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.6-b.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.9-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""></p>
|
|
|
|
<p>Searchlight signals with Lunar aspects leading to a restricted siding:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.7-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.13-c.gif" alt=
|
|
""></p>
|
|
|
|
<p>Searchlight signals without Lunar aspects leading to a restricted siding:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-a.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.7-b.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-2-high/rule-9.1.13-b.gif" alt=
|
|
""></p>
|
|
|
|
<p>Automatic block searchlight signals leading to an occupied block:</p>
|
|
|
|
<p><img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.3-s.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.6-s.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.8-s.gif" alt=
|
|
""> <img src=
|
|
"../../../resources/icons/smallschematics/aspects/BNSF-1996/SL-1-high/rule-9.1.14-s.gif" alt=
|
|
""></p>
|
|
|
|
<p>Triple head/arm masts will typically only be required at the entrance to a complex
|
|
interlocking with multiple divergences. Simple single divergences will only require a double
|
|
head/arm mast with appropriate approach masts.</p>
|
|
|
|
<p>See the <a href="aspects.xml">Aspects page</a> for full details of the available masts and
|
|
aspects.</p>
|
|
|
|
<p>Semaphore Signal Mast definitions:</p>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SE-1A.xml">Single arm Absolute signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-1R.xml">Single arm Restricting signal</a> (with 'G' plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-1S.xml">Single arm Stop and Proceed signal</a> (with number plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-1D.xml">Single arm Distant signal</a> (with 'D' plate)
|
|
</li>
|
|
</ul>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SE-2A.xml">Double arm Absolute signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-2R.xml">Double arm Restricting signal</a> (with 'G' plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-2S.xml">Double arm Stop and Proceed signal</a> (with number plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SE-2D.xml">Double arm Distant signal</a> (with 'D' plate)
|
|
</li>
|
|
</ul>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SE-3A.xml">Triple arm Absolute signal</a>
|
|
</li>
|
|
</ul>
|
|
|
|
<p>Searchlight Signal Mast definitions:</p>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SL-1A.xml">Single head Absolute searchlight signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-1P.xml">Single head Permissive searchlight signal</a> (with Lunar
|
|
proceed aspect in place of Green)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-1R.xml">Single head Restricting searchlight signal</a> (with 'G'
|
|
plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-1S.xml">Single head Stop and Proceed searchlight signal</a> (with
|
|
number plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-1D.xml">Single head Distant searchlight signal</a> (with 'D'
|
|
plate)
|
|
</li>
|
|
</ul>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SL-2A.xml">Double head Absolute searchlight signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2L.xml">Double head Absolute searchlight signal</a> (with Lunar on
|
|
lower head in place of Red)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2R.xml">Double head Restricting searchlight signal</a> (with 'G'
|
|
plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2S.xml">Double head Stop and Proceed searchlight signal</a> (with
|
|
number plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2SL.xml">Double head Stop and Proceed searchlight signal</a> (with
|
|
number plate and Lunar in place of Red on lower head)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2D.xml">Double head Distant searchlight signal</a> (with 'D'
|
|
plate)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-2DL.xml">Double head Distant searchlight signal</a> (with Lunar in
|
|
place of Red on lower head)
|
|
</li>
|
|
</ul>
|
|
|
|
<ul>
|
|
<li>
|
|
<a href="appearance-SL-3A.xml">Triple head Absolute searchlight signal</a>
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-3L2.xml">Triple head searchlight signal</a> (with Lunar in place
|
|
of Green on centre head)
|
|
</li>
|
|
|
|
<li>
|
|
<a href="appearance-SL-3L3.xml">Triple head searchlight signal</a> (with Lunar in place
|
|
of Green on lower head)
|
|
</li>
|
|
</ul>
|
|
|
|
<!--#include virtual="/Footer.shtml" -->
|
|
</div>
|
|
<!-- closes #mainContent-->
|
|
</div>
|
|
<!-- closes #mBody-->
|
|
<script src="/js/main.js"></script>
|
|
</body>
|
|
</html>
|