please review:
the tag highway=aslb
on node/662550884
looks like a typo, I've no idea what it means
and it is only used once in OSM

forgot to say: if you enter only partial
search values in taginfo, it might show you
typos as well, e.g. "flood" will find all
values containing the word "flood"

okay very easy:
visit taginfo.openstreetmap.org/
click on highway in the squre titled "keys",
select the tab "values" and enter floodway
in the search field. You will only find one
place, that's why I contacted you.
When you click on the word floodline
you can continue with the buttons in the upper right corner. The one for "overpass turbo" leads you to a great tool for this
kind of query, you can also go to
http://overpass-turbo.eu/
directly and click on "Wizard" .

thanks for the reply. I think surface is
asphalt, not grass?

please review:
highway=private is unusual.
Did you mean
highway=service
service=driveway
access=private ?

please review:
unusual tag highway=private on node/3544890610.
Is that a barrier or maybe the way has
access=private ?

please note:the tag
highway="mixed residential & commercial"
is invalid. I've changed it to
highway=residential

please review:
some ways now have tags like
highway=Generic Pa
or
highway=Generic Path
I guess you always meant
highway=path
name=Generic Path
?

the tag road=* is not rendered. I'll
change ways with that to highway=*
See highway=*

I see attribute flooded=* and floodable=*
in taginfo. I guess the latter is good here?

found the pdf with google :-)

Thanks for the reply. The link to
the pdf doesn't work, but
I understand that there is a difference.
Question is: Why is this the only element
in OSM with this tag?
Do you know other places which should
be the same?

please check:
node/1336679480 highway=effluent_disposal
The tag is uncommon. Maybe
amenity=sanitary_dump_station matches better?

please check uncommon tagging:
node/2984506160 has
highway=floodway
Did you mean ford=yes ?
ford=*

please review:
way/375660705 has invalid tag
highway=residential;unclassified

please review:
your change left a tag
"highway": "residential;tertiary",
I've tried to repair this.

bitte prüfen:
warum zwei Wege für ein Gebäude?
way/336769794,way 102694913

please review :
way/80540464 got invalid tag
highway=residential;unclassified

I've changed it to residential and also the
ways nearby

the tag highway=x-residential seems to indicate that the way does no longer exist.
It might be confused with something like
"extra-residential".
I am searching for a better way to express that a way doesn't exist.
Please join the discussion at
http://gis.19327.n5.nabble.com/how-to-tag-a-quot-highway-quot-that-doesn-t-exist-tt5857111.html

the tag highway=neverbuilt is not widely use.
Please join the discussion at
http://gis.19327.n5.nabble.com/how-to-tag-a-highway-that-doesn-t-exist-tp5857111.html