[OSM-talk-be] bridge or tunnel?

[ghia]

I think  some passages are called a mole pipe, but that makes it not a
tunnel. 

Don't have tunnel vision: All your examples are railroad bridges. 

A tunnel has mosttimes also a depth: it lies not under, but beneath
something and/or crosses several things. 

Also, sometimes a traffic sign F8 can be found near the entrence. 

Regards, 

Gerard

OSMDoudou schreef op 2019-05-27 21:32:

> If it can help, Wikipedia cites criteria like twice as long as wide and "creating a confined area". 
> 
> https://en.m.wikipedia.org/wiki/Tunnel 
> https://fr.m.wikipedia.org/wiki/Tunnel 
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