[Tagging] Zone 30 (maxspeed)

[Colin Smale]

  On 06/07/2010 18:44, Richard Mann wrote:
> I'm not really clear what is the value of tagging a "zone", except in
> a note. Why not just use the standard maxspeed tag?

+1

Here in NL it warns you that the given road sign (could be maxspeed, 
could be some other restriction) is valid "until further notice" i.e. 
until you leave the Zone. Without the Zone indication the restrictions 
lose their official validity at the next junction, which leads to speed 
limits etc. having to be repeated very frequently. So it is really only 
a shorthand notation to save money on signs and to reduce the clutter of 
street furniture. The default speed limit in built-up areas is 50kph so 
that actually rarely needs to be signed at all. But to make an area 
limited to 20kph means it has to be signed explicitly.

It sure would make life easier if you could just draw a (temporary) 
polygon and get Potlatch to set maxspeed=20 on all enclosed roads though...

Colin