+1 (similar to our discussion here in Brazil) On Sun, Nov 3, 2013 at 5:07 PM, Jonathan <bigfatfro...@gmail.com> wrote: > Sorry if I've not seen the old posts on this, the wiki pages are > contradictory which is why I asked the question. > > In the UK we are defining Trunk or Primary based on some arbitrary > definition not on anything that is of use to any user or renderer. > > What we should be mapping is reality, so that people can use that data to > build on. Whether a road is signed in Green, Pink or Purple tells a user > nothing, it may have a legal definition but that is all. The tag we give it > should tell the user something about the road's capabilities, importance, > size and potential timings/traffic flow. A Trunk road that is a dual > carriageway with a maxspeed of 70 mph is very different to a Trunk road that > winds around fields and has a maxspeed of 50 mph or less! > > Jonathan > > http://bigfatfrog67.me > > > On 03/11/2013 00:14, Tom Hughes wrote: >> >> On 02/11/13 18:47, Jonathan wrote: >> >>> I'm not clear with the distinction of a Trunk road in the UK. The wiki >>> suggests a trunk road is "high performance roads that don't meet the >>> requirement for highway >>> <http://wiki.openstreetmap.org/wiki/Key:highway>=motorway >>> <http://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway>" which to me >>> >>> would suggest an A road that is a dual carriageway. Further on in the >>> wiki it says that any A road in the UK signed with "Green" signs is a >>> "Trunk" road. >>> >>> I know of many "Green" "A" roads that aren't much more than country >>> lanes, they are definitely not "high performance" and I don't feel they >>> should be "Trunk" roads, I feel they should be "Primary" roads. >> >> >> It's really very simple, and has been discussed here many, many times >> before and I'm sure there are multiple pages on the wiki covering it. >> >> First, forget the question of which roads are formally designated as trunk >> roads by the Department for Transport (which is not very many these days). >> >> Second, understand that there is something called the Primary Route >> Network defined by DfT which covers those A roads connecting specific major >> towns. Those are the A roads with the green signs, and are what we tag as >> highway=trunk. Other A roads are highway=primary. >> >> In many cases those will be major roads, often ex trunk roads, but in more >> rural areas like the highlands they might look more like a B road does in >> other parts of the country. That is irrelevant though. >> >> In the UK it is really only residential/unclassified/tertiary where you >> need to make a judgement call. Everything else has a well defined mapping: >> >> Motorways => highway=motorway >> Green Signed A Roads => highway=trunk >> White Signed A Roads => highway=primary >> B Roads => highway=secondary >> >> Hopefully that will explain everything ;-) >> >> Tom >> > > > _______________________________________________ > Tagging mailing list > Tagging@openstreetmap.org > https://lists.openstreetmap.org/listinfo/tagging
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