Is the tag vehicle=delivery really correct here?

Is this really a oneway?

way/38786838 contains incorrect data (duplicate node and duplicate segments according to josm)

data for way/3471854 is incorrect. josm says: way contains segment twice.

This way way/838210025

contains duplicate nodes:

2* 7825668240 and 2* 7825668201

Is this way really not connected outside of the building to the West Observatory Road?

This small road section is not accessible by walking. Is this correct?

osm.org/directions?engine=graphhopper_foot&route=42.5111%2C1.5470%3B42.5177%2C1.5559#map=15/42.5195/1.5383&layers=N

There seems to be some inconsistency. The bridge has no maxweight tag but this road has one?

way/309273551

Is this lift_gate passable for motor vehicles? Can we even add access=yes?