According to aerial images there are no signs of any embankments etc in the area.
railway=disused is not the proper tag as it describes railway with tracks still in place

I'm afraid this abandoned project does not comply with current OSM rules but on the other hand it is of historic significance and I'm not sure if removing it completely is a good step either.

osm.wiki/Railways

Please be more careful not to create buildings or streams that share nodes with other boundaries (e.g. with residential areas). It's deemed as a warning during validation.

Hi,
I would like you to help me to understand why you you decided to tag the Praha - Poříčany railway line with "passenger_lines=2" where there are actually three lines.

I was reading the corresponding wiki page but haven't figured out the reason why it should be 2 instead of 3.

Thank you for explaining me.
Best,
Martin

Ciao BecSt,

thank you for trying to improve OpenStreetMap in Lugano.
I have just noticed that buildings of the USI were missing on the map, as you marked each of them as a separate campus, as if each of them were a separate university.

I would like to ask you not to delete the "building" key of university buildings. It makes them disappear from the map.

It's always a good idea to check the OSM wiki on how to map features.
I have fixed USI according to OSM wiki:
osm.wiki/Tag:amenity%3Duniversity
and I will also have to have a look at Instituto Elvetico, which is also missing a building.

Grazie mille
Martin