On 2020-06-05 17:34, garry.keenor(a)gmail.com wrote:
Hi, a follow up to this.
Specifically, in the UK we have a significant network of 4th rail
electrification in London... around 250 route miles. At the moment
this is tagged as electrified=rail, so there is no way of
differentiating it from 3rd rail (which we also have a lot of, in the
same area). The system is fundamentally different from 3rd rail, which
uses the running rails asthe return path rather than a dedicated
As far as I can establish, the only use of this system outside the UK
is in Milan, but there may be others we're not aware of?
We would therefore like to propose the use of electrified=4th_rail for
these systems. We would obviously like to get views and build
consensus before embarking on any tagging changes.
I think that is a good addition. And tag 3rd rail systems as
electrified=3rd_rail as well.
There is also electrified:rail that specifies the type of contact (top,
bottom, side). Obvioudly you will use
electrified:4th_rail=top/bottom/side for 4th rail systems.