danke für die Rückmeldung.
Tatsächlich, das deutsche wiki scheinnt da etwas restriktiver als das englische.
Also ist das tagging der "Insel" selbst durchaus okay, aber warum das unübliche highway=traffic_island
und die mp-relation?

please review
osm.org/way/376169967
it is tagged highway=track;road

sorry, meant it was tagged
highway=tertiary;residential

Please review:
osm.org/way/176117658
was tagged
lanes=4
highway=residential
sidewalk=both
I've changed it to
lanes=2,
highway=residential
sidewalk=right
osm.org/changeset/35072335

please review:
due to a problem in the iD editor you have
merged ways with different attributes so that there tags are now invalid, e.g.
highway= "service;track;living_street"
osm.org/way/165381218
osm.org/way/165381220
osm.org/way/311782226
osm.org/way/378132112
Let me know if you need help to fix that.

please review:
you have used the tag highway=no_exit
on two nodes. The correct spelling is
highway=noexit.
Anyhow, one node was not the last in a highway, the other ends at a pier which also seems to allow to continue by foot or boat, so I've removed both.
See osm.wiki/Key:noexit

please review osm.org/node/393990167
had confusing tags (bus stop and crossing), see my changes
osm.org/changeset/35067602

please review:
you have somehow moved the node
osm.org/node/30964000
by 139 m, some roads looked very strange.
I've placed the node at the old location.
See osm.org/changeset/35067438

please review my changes reg. the mistagged and misplaced node
osm.org/node/1816762566

thanks for the quick feedback :-)

please review:
I've tried to fix invalid tagging of node
osm.org/node/1836811749
See osm.org/changeset/35065527

:-)
okay, I'll remove it

please review:
osm.org/node/63174448
The tag highway=flashers is only used here.
Is it a special form of highway=traffic_signals?

please review osm.org/node/51104337
The tag highway=stop_light is only used here. Is it a highway=traffic_signals ?
There are more highway=traffic_signals
close to it.

please review
osm.org/node/1751162352
The tag highway=maintenance is only used here, what does it mean?

please review
osm.org/node/2432565550
I've changed highway=street_map to
tourism=information
information=map

I found amenity=parking_entrance, so I've changed it to that, see
osm.wiki/Tag:amenity%3Dparking_entrance

please note:
I've changed highway=gate to barrier=gate
osm.org/node/3812729111
See also
osm.wiki/Tag:barrier%3Dgate

bitte erklären:
was beschreibt diese Relation?
Habe keine Erklärung für das tag
type=tmc:area
gefunden, nur für type=TMC.
Siehe auch
osm.org/changeset/26524377
Ist das tag highway=A3.0 tatsächlich richtig?
JOSM meckert, wenn ich es auf class zurück ändern will:
class is deprecated, use highway instead (1)

oh, sorry, I sehe gerade, dass es gar keine boundary relation ist, sondern
type=tmc:area
Da muss ich mich selber erst mal schlau lesen.