[Tagging] Tunnels and bridges

[Martin Vonwald]

2013/1/31 Malcolm Herring <malcolm.herring at btinternet.com>:
> On 31/01/2013 13:44, Martin Vonwald wrote:
>>
>> * <something>=bridge : this is the tag we should decide one. I guess
>> the value "bridge" is unchallenged.
>
>
> -1
> If the primary tag is bridge=<type>, then why do we need the above tag at
> all?

The key "bridge" is currently used to specify that something else is
on a bridge, e.g. highway=motorway + bridge=yes. The value of the key
bridge specifies the type of the bridge. We should try not to change
the meaning of a tag too much. Therefore I would suggest:
* <something>=bridge   ---> this is a bridge
* bridge=<type>  ---> this is a bridge of type <type> (same meaning as now)

Martin