[Tagging] name on city_limit traffic sign and guidepost

[marc marc]

Hello,

On the french speaking mailing, a mapper think that the name of 
traffic_sign=city_limit or on a guidpost it not really a name.
it's the name of a feature (a city, a forest, a peak) that is nearby of 
the sign itself.
what do you think about ?
should a better keyname be used ?

http://wiki.openstreetmap.org/wiki/Tag:traffic_sign%3Dcity_limit
http://wiki.openstreetmap.org/wiki/Tag:information%3Dguidepost

Regards,
Marc