[talk-au] maxspeed - best practice?

Ian Sergeant inas66+osm at gmail.com
Tue Aug 14 11:44:28 BST 2012


On 14 August 2012 19:37, Michael James <m.james at internode.on.net> wrote:


> 2. Guidelines for highway=residential and highway=unclassified
> The guidelines http://wiki.openstreetmap.org/wiki/Key:highway
> give the direction that if houses are on the side of a minor road then
> it should be tagged residential however on the edges of towns and cities
> you can have such streets as per OSM's definition but they will fail to
> fulfill the definition as given in Australian law for an Urban Road and
> thus not have a default of 50kph
>
>
As you point out, there isn't a 1-to-1 correspondence between
highway=residential and the default 50km/h speed limit.  Therefore, we
can't rely on an automated rule, and therefore we have to tag maxspeed to
have an accurate database of speeds.


> tag if signed
> maxspeedsource=sign
>
> tag if not signed and satisfies the definition
> maxspeedsource=built_up_area
>
>
Please use:

source:maxspeed=

as is the convention.

Thanks,
Ian.
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