[Tagging] barrier enforcing maxwidth

[Colin Smale]

This is overloading the maxwidth tag - sometimes it means legal,
sometimes it means physical. This distinction needs to be crystal clear
as it can be a matter of life and death (emergency vehicles can ignore
legal limits but not physical ones...) so making its semantics so
context-dependent is not a good idea... 

maxwidth:physical is being used to tag the actual available width -
which by the way is not the same as the distance between the kerbs or
the width of the whole carriageway including paths/grass etc. That may
be better tagged using width=* but the description of that in the wiki
is not particularly clear. 

http://wiki.openstreetmap.org/wiki/Key:maxwidth:physical 

http://wiki.openstreetmap.org/wiki/Key:width 

--colin 

On 2015-09-08 08:44, Volker Schmidt wrote: 

> I use "maxwidth" to map the max width road signs, which represent a legal access restriction, not necessaryly a physical acess restriction.
> 
> I use "width" to tag the physical width of a road.
> 
> If there is an object on the road that physicslly limits the width of the vehicles you can use the tag barrier=block like this
> 
> barrier=block
> material=concrete
> maxwidth=2
> vehicle=yes
> foot=yes 
> Replace concrete with metal and you have a tag for your metal-pole width restrictor 
> 
> Volker 
> Padova, Italy 
> 
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