I wouldn't invent a type tag, it's maxspeed = 20 mph because that's what the
sign says. There is nothing special about these areas.
Phil (trigpoint)
On 1 May 2018 09:58:23 BST, Tobias Zwick <o...@westnordost.de> wrote:
>Regarding the 20mph zones
>(see https://en.wikipedia.org/wiki/30_km/h_zone), analogous to other
>countries where they exist, they would be tagged as
>maxspeed:type=GB:zone20.
>
>On 30/04/2018 20:57, Philip Barnes wrote:
>> Whilst in theory there is an implicit 30mph when street lights are
>> present and there are no repeater signs indicating a higher limit
>then
>> the speed limit is 30 mph. It has nothing to do with urban, the same
>> rule will apply on lit rural roads. These days it is complicated by
>> 20mph limits which also have no repeaters.
>>
>> That is the theory, however in over 40 years of driving and even
>longer
>> cycling I have never come across an unsigned 30mph limit. It is
>always
>> signed as you enter the zone. Whilst it's useful for confirmation
>whilst
>> driving, it is not really useful for mapping, you need to survey the
>> start points so that it can be split at the appropriate points.
>>
>> Phil (trigpoint)
>>
>>
>> On 30 April 2018 18:41:26 BST, Tobias Zwick <o...@westnordost.de>
>wrote:
>>
>> Hi there
>>
>> On tagging implicit speed limits in the United Kingdom, the wiki
>lists
>> the following values [1] for "maxspeed:type":
>>
>> GB:nsl_single (=60 mph), GB:nsl_dual (=70 mph) and GB:motorway
>(=70 mph)
>>
>> I understand that the current legislation defines a road with
>> road-lighting as a built-up area in which a lower implicit speed
>limit
>> of 30 mph applies. There is no mention of it in the wiki, no
>GB:urban,
>> GB:lit, GB:zone30 or anything like that, so something should be
>defined
>> and documented by (you,) the British OSM community.
>>
>> My question:
>> How to tag roads in which such an implicit speed limit for
>built-up
>> areas applies?
>>
>> The question is motivated by an issue report for StreetComplete
>[2]
>>
>> Cheers
>> Tobias
>>
>> [1]
>>
>https://wiki.openstreetmap.org/wiki/Speed_limits#Country_code.2Fcategory_conversion_table
>>
>> [2] https://github.com/westnordost/StreetComplete/issues/1037
>>
>>
>------------------------------------------------------------------------
>>
>> Talk-GB mailing list
>> Talk-GB@openstreetmap.org
>> https://lists.openstreetmap.org/listinfo/talk-gb
>>
>>
>> --
>> Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
_______________________________________________
Talk-GB mailing list
Talk-GB@openstreetmap.org
https://lists.openstreetmap.org/listinfo/talk-gb
