[Tagging] Chaos and uncertainty in "bridge"

[Volker Schmidt]

>
> The principal should also be extended to tunnels.
>
> eg tunnel:structure, using values like - "excavated" (shallow cut and
> cover tunnels), "bored" (deeper tunnels), and "covered" (ground-level
> tunnels enclosed by a building/structure).
>

I don't think this withion the scope of  general OSMapping. A laymen can
often not distinguish how a tunnel was originally constructed. And it does
not matter for the en-user of the maps produced from OSM data.

I could only find a reason to separate out the cover by a building.

Volker
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