[Tagging] Feature Proposal - RFC - Tunnel ADR Category

[Nathan Edgars II]

On 5/15/2011 4:49 PM, Colin Smale wrote:
> Following a brief exchange on the list a couple of weeks ago I have now
> put this into a formal proposal.
>
> The proposal is to introduce a new tag "tunnel:adr_category" to contain
> the ADR (hazardous materials by road) category of a tunnel.
>
> http://wiki.openstreetmap.org/wiki/Proposed_features/tunnel:adr_category

Why is this in the tunnel namespace? Theoretically these could also 
apply to non-tunnels.