[Talk-GB] Speed Limit - Trains Was: Re: maxspeed field - what units should we use. etc

[Shaun McDonald]

What do you do when the centre tracks are the fast tracks and the  
outer 2 tracks are the slow stopping lines, like the line near me that  
runs from London Bridge to East Croydon via Forrest Hill. This is in  
contrast to some other stations such as those in North London, where  
you the 2 fast tracks beside each other, and then 2 slow tracks, often  
with the slow tracks having an island platform at the stations.

Should these 2 be mapped differently. I'd like to add the detail of  
the platforms, and the access to the platforms.

Shaun

On 5 Jun 2009, at 18:31, Richard Mann wrote:

> It is a different issue. Generally if there are 4 tracks, 2 will be  
> the fasts and 2 the slows (except on the western when they are mains/ 
> reliefs). Having a pair of lines where virtually nothing stops makes  
> a huge difference to the service pattern. The actual linespeeds can  
> be quite similar, so linespeed isn't sufficient to tell them apart.
>
> Richard
>
> On Fri, Jun 5, 2009 at 11:27 AM, Peter Miller <peter.miller at itoworld.com 
> > wrote:
>
> On 5 Jun 2009, at 11:23, Richard Mann wrote:
>
>> Yes but if you do that, make sure that there's a tag used for lines  
>> which are "fast", otherwise you won't easily be able to tell which  
>> routes have separate tracks for fast and slow trains (maybe that  
>> exists already)
>
> Individual tracks can of course have different maxspeed tags if they  
> are modelled using different ways. Possibly that is a different  
> issues from fast/slow trains but this is getting outside my area of  
> knowledge.
>
>
>
> Regards,
>
>
>
>
> Peter
>
>
>>
>> Richard
>>
>> On Fri, Jun 5, 2009 at 11:08 AM, Steve Hill <steve at nexusuk.org>  
>> wrote:
>> On Fri, 5 Jun 2009, Peter Miller wrote:
>>
>> I am certainly not proposing separate ways for separate lines. I  
>> think
>> there should either be one way for a bunch of parallel tracks or
>> alternatively one way per track if people are getting nerdy (surely
>> not!).
>>
>> Tracing individual tracks might make sense if people are tracing  
>> from photos.  Especially true for sidings, etc.  I don't really see  
>> it as much different to having separate ways for the two sides of a  
>> dual carriageway.
>>
>>  - Steve
>>   xmpp:steve at nexusuk.org   sip:steve at nexusuk.org   http://www.nexusuk.org/
>>
>>     Servatis a periculum, servatis a maleficum - Whisper, Evanescence
>>
>>
>
>
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