[OSM-newbies] Proper use of "bicycle = no" tag

[Toni Erdmann]

Johannes Hüsing schrieb:
> Isaac Wingfield schrieb:
>> There was a sign  
>> at the end saying "NO Bicycles. NO Skateboards, ..." basically  
>> forbidding everything that has wheels.
>>
>>   
> including strollers?
> 
>> It occurred to me that there could be two entirely different reasons  
>> for using the tag "Bicycle = no"; first, because of the condition of  
>> the surface, or its slope, or something else physical, that would just  
>> make it impossible to ride a bike on it, or second, that although the  
>> surface would be fine for bike riding, it is forbidden by a sign.
>>
>> So the question is, does that one tag "bicycle = no" apply to both of  
>> those cases, or is there a proper tag for the way that would make the  
>> difference clear?
>>
>>   
> To my mind (and according to the Wiki), bicycle=no is rather
> for legal restrictions, with the possible exception of a
> qualifying tag of a barrier (which is often used
> to enforce restrictions physically). Physical attributes should
> be expressed with the width, tracktype  and surface tag.

I use also

smoothness=excellent|good|intermediate|bad|very_bad|horrible|very_horrible|impassable

see: <http://wiki.openstreetmap.org/wiki/Map_Features#Properties>

Toni