How do other vehicles pass the canal? Is here a ford=yes node missing?

two different rivers? That looks wrong

please check position and mapping of highways and buildings

highway=crossing should not
be used with ways

Auf Luftbildern sieht man hier keinen Weg

connection of roads missing
Is there any?

can't see a stream in Bing here

please check ways with the tag list=IV
See also changeset/34724946

bridge?

is here also an elevator ?