Re: [Talk-GB] NSL in built-up areas: what source:maxspeed to use?
On 25 May 2012 12:30, Andrew Chadwick a.t.chadw...@gmail.com wrote: What value should we use for source:maxspeed=* in built-up areas when there's no signage or road markings, just street lights?http://lists.openstreetmap.org/listinfo/talk-gb There was bit of discussion on this about a year ago. While some guidance may strongly indicate (mislead?) that lightng+urban area = 30mph this is not the case. These roads are 'National Speed Limit - Restricted Roads', where the presence of street lighting enforces and reminds that the road is a Restricted Road. As Restricted Roads do not necessarily occur in 'build up areas' I think using built-up_area would be misleading. The word 'restricted' may not be commonly used, but it has the effect of making people think about what they're adding. More importantly taginfo shows source:maxspeed=UK:restricted_road is clearly the common way of tagging uk restricted roads. http://taginfo.openstreetmap.org/search?q=source%3Amaxspeed%3Duk I didn't respond the original emails a year ago, but as a result I did start adding speed limits. Quickly realised how utterly confusing UK/GB speed limits are and wrote down a bundle of notes mainly aimed at trying to work out speed limits on badly signed roundabouts along NSL roads. Lost original notes but a lot was remembered and I've added them to a personal 'uk speed limit notes page'. I think it sums up GB/UK speed limits, and I've cleaned it up a lot today. http://wiki.openstreetmap.org/wiki/User:Jamicu/UK_Speed_Limits Second issue is the change in the wiki to suggest GB instead of UK. The intended result is the same and I have a preference for GB because it's 'official', but once again taginfo shows that UK is the common way of indicating the speed limit is British version. http://taginfo.openstreetmap.org/search?q=source%3Amaxspeed%3Duk http://taginfo.openstreetmap.org/search?q=source%3Amaxspeed%3Dgb I can't support changing to GB unless it involves changing all the UK maxspeeds to GB maxspeeds. Having two versions is confusing and unless this can happen I'd rather stick with UK. Cheers, Jason ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
[Talk-GB] NSL in built-up areas: what source:maxspeed to use?
What value should we use for source:maxspeed=* in built-up areas when there's no signage or road markings, just street lights? Specifically the concept expressed in http://en.wikipedia.org/wiki/Built-up_area_%28Highway_Code%29 Searching taginfo suggests: * source:maxspeed=GB:built-up_area (+ var: built_up-area...) From 1385 uses without GB: or UK: prefix for the somewhat uncommon maxspeed:default=*, but we could use it for the more usual key too. Source: http://taginfo.openstreetmap.org/search?q=maxspeed%3Dbuilt * source:maxspeed=GB:restricted_road From 394 uses of similar-looking things in taginfo, most of which are UK: prefixed. Src: http://taginfo.openstreetmap.org/search?q=maxspeed%3Drestricted Any other possibilities? I think I prefer the former even if using both a hyphen and an underscore make it ugly and error-prone. It's the more common term in everyday parlance, and we're not doing designations here. There don't seem to be any relevant matches for lit or light. I'm planning on making a presets bundle for them, so values would need would need to fit alongside GB:motorway, GB:nsl_dual, GB:nsl_single. -- Andrew Chadwick ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
Re: [Talk-GB] NSL in built-up areas: what source:maxspeed to use?
On 25/05/12 12:30, Andrew Chadwick wrote: What value should we use for source:maxspeed=* in built-up areas when there's no signage or road markings, just street lights? There *should* always be signage indicating a change in maxspeed from something else to 30 mph. The street lights merely act as repeaters, since normally repeaters are required every so many yards for a non-NSL limit. The presence of street lights does *not* mean 30 mph (just need to look at any lit motorway for evidence of this). I have found anomalies, though. In fact, I happen to live on a road which is not signed correctly. It joins a 40 mph road, but there is no indication of change of speed limit. I have informed my local council about this but never heard anything back. I think really the only thing we can do in such situations is use common sense. So source:maxspeed=common_sense? Alternatively, you could ask the local council which should know the real limits. -- Borbus. ___ Talk-GB mailing list Talk-GB@openstreetmap.org http://lists.openstreetmap.org/listinfo/talk-gb
