Hi Garry,
On 2020-06-13 18:49, Garry Keenor wrote:
> Also, there are only 2 networks that I can identify worldwide that are 4th
> rail, and I've tagged them both already. :-)
You may have missed one I just discovered that the LIM lines of
SkyTrain (Vancouver) have some kind of 4-rail
I think it is fairly unlikely that any more 4th rail will be built, and
certainly not converted. It is a system which makes it difficult to detect
earth faults, as well as making the design of junctions more complex. Not
impossible though.
best regards,
Garry
On Sun, 14 Jun 2020 at 12:22, Paul
On Sat, 13 Jun 2020 at 17:50, Garry Keenor wrote:
> Paul - thanks for the response. I struggle with the idea that someone
> would know that a route is electrified with a ground level contact system,
> but not how many rails there are. The possible sources are a) local
> knowledge,
>
Or
> there are only 2 networks that I can identify worldwide that are 4th
rail, and I've tagged them both already.
If that's the case, is it worth tagging the distinction between 3rd and 4th
rail systems?
If so, perhaps only the rare 4th rail systems need a new tag, and we can
keep electried=rail
Paul - thanks for the response. I struggle with the idea that someone would
know that a route is electrified with a ground level contact system, but
not how many rails there are. The possible sources are a) local knowledge,
b) wikipedia and c) aerial imagery. All of these will, 9 times out of 10,
> Using electrified=rail to mean 3 rails and having a sub-tag for 4 rails
is a bad
thing.
+1
Volker
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On Thu, 11 Jun 2020 at 08:57, Garry Keenor wrote:
>
> Re: using electrified=rail to mean (3rd or 4th rail)
> I'm not in favour of this one - railway electrification engineers (of
> which I am one) do not consider 4th rail to be a special case of 3rd rail,
> but rather a distinct system with its
Michael,
Thanks for your comments. I'm a bit behind so I'll try to catch up with
your comments to date.
Re: 3rd_rail/4th_rail vs 3rail/4rail
I really don't mind and will go with the majority. Not sure how you
determine a majority with this process!
Re: using electrified=rail to mean (3rd or 4th
