<div dir="ltr"><div>The first three characters are the "Engineers Line Reference" and used by the civils engineers for a few tens of miles of track (the signalling people have a completely separate location coding, and the timetable planners yet another...). </div>
<div> </div><div>For instance the line through Oxford is the DCL (Didcot to Chester line), but you'll need to have an interest in railway history to appreciate the logic of that.</div></div><div class="gmail_extra"><br>
<br><div class="gmail_quote">On Tue, Apr 9, 2013 at 8:00 PM, Gregory Williams <span dir="ltr"><<a href="mailto:gregory@gregorywilliams.me.uk" target="_blank">gregory@gregorywilliams.me.uk</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-GB" vlink="purple" link="blue"><div><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Yes, this is what I do. In fact the example which Chris picked out was done by me a few years ago when I cycled through the area. I’ve tagged quite a few bridges like this in Kent. You’ll also notice that I’ve included the operator, operator’s phone number, bridge name, etc. on the relation too when they’re included on the sign.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Railway structure numbers seem to have a letter portion, which denotes the line, and a sequential numeric portion. Occasionally there are places where an extra bridge has been added and these have a letter suffix, just like extra motorway junctions.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Cheers,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p><p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt">Gregory<u></u><u></u></span></p>
<p class="MsoNormal"><span style="color:rgb(31,73,125);font-family:"Calibri","sans-serif";font-size:11pt"><u></u> <u></u></span></p><div style="border-width:medium medium medium 1.5pt;border-style:none none none solid;border-color:currentColor currentColor currentColor blue;padding:0cm 0cm 0cm 4pt">
<div><div style="border-width:1pt medium medium;border-style:solid none none;border-color:rgb(225,225,225) currentColor currentColor;padding:3pt 0cm 0cm"><p class="MsoNormal"><b><span style="font-family:"Calibri","sans-serif";font-size:11pt" lang="EN-US">From:</span></b><span style="font-family:"Calibri","sans-serif";font-size:11pt" lang="EN-US"> Chris Hill [mailto:<a href="mailto:osm@raggedred.net" target="_blank">osm@raggedred.net</a>] <br>
<b>Sent:</b> 09 April 2013 14:55<br><b>To:</b> Andy Mabbett; <a href="mailto:talk-gb@openstreetmap.org" target="_blank">talk-gb@openstreetmap.org</a><br><b>Subject:</b> Re: [Talk-GB] Railway bridge numbers<u></u><u></u></span></p>
</div></div><p class="MsoNormal"><u></u> <u></u></p><p style="margin-bottom:12pt" class="MsoNormal">Some railway bridges near me have already been added to a bridge relation, not by me, that includes the reference. See <a href="http://www.openstreetmap.org/browse/relation/446579" target="_blank">http://www.openstreetmap.org/browse/relation/446579</a> as an example. I don't know if this a good idea or not, nor if the number is what you have in mind.<br>
<br>Cheers, Chris<br>OSM User chillly<u></u><u></u></p><div><p class="MsoNormal">Andy Mabbett <<a href="mailto:andy@pigsonthewing.org.uk" target="_blank">andy@pigsonthewing.org.uk</a>> wrote:<u></u><u></u></p><blockquote style="border-width:medium medium medium 1pt;border-style:none none none solid;border-color:currentColor currentColor currentColor rgb(204,204,204);padding:0cm 0cm 0cm 6pt;margin-right:0cm;margin-left:4.8pt">
<pre style="margin-bottom:12pt;white-space:pre-wrap;word-wrap:break-word"><span style="font-family:"Arial","sans-serif"">All railway bridges (over- and under-) in the UK have a unique number.<br>often carried on a metal (more recently plastic) identification plate,<br>
or painted on:<br><br><a href="http://www.semgonline.com/structures/numbering.html" target="_blank">http://www.semgonline.com/structures/numbering.html</a><br><br>Among other things, these are used to speedily identify the bridge in<br>
case of a vehicle strike which may pose a danger to trains or other<br>traffic:<br><br><a href="http://www.networkrail.co.uk/aspx/3563.aspx" target="_blank">http://www.networkrail.co.uk/aspx/3563.aspx</a><br><br>Do we have a scheme for tagging UK railway bridges with their numbers?<br>
I have looked on Wiki, and can't find anything, and my local bridges<br>are either not tagged; or tagged (for example) ref = B4124:<br><br><a href="http://www.openstreetmap.org/browse/way/103233329" target="_blank">http://www.openstreetmap.org/browse/way/103233329</a><br>
<br>which does not identify that number as being a NetworkRail reference<br>(if indeed it is, being on a road overbridge maintained by the local<br>authority).<br><br>If we do not have something more specific, I'm happy to draft<br>
something for discussion.<span class="HOEnZb"><font color="#888888"><br><br>--<br>Andy Mabbett<br>@pigsonthewing<br><a href="http://pigsonthewing.org.uk" target="_blank">http://pigsonthewing.org.uk</a><u></u><u></u></font></span></span></pre>
<span class="HOEnZb"><font color="#888888"><pre style="text-align:center"><span style="font-family:"Arial","sans-serif""><hr align="center" size="2" width="100%"></span></pre><pre><span style="font-family:"Arial","sans-serif""><br>
Talk-GB mailing list<br><a href="mailto:Talk-GB@openstreetmap.org" target="_blank">Talk-GB@openstreetmap.org</a><br><a href="http://lists.openstreetmap.org/listinfo/talk-gb" target="_blank">http://lists.openstreetmap.org/listinfo/talk-gb</a><u></u><u></u></span></pre>
</font></span></blockquote></div></div></div></div><br>_______________________________________________<br>
Talk-GB mailing list<br>
<a href="mailto:Talk-GB@openstreetmap.org">Talk-GB@openstreetmap.org</a><br>
<a href="http://lists.openstreetmap.org/listinfo/talk-gb" target="_blank">http://lists.openstreetmap.org/listinfo/talk-gb</a><br>
<br></blockquote></div><br></div>