I added conditions so that the three cases where the question is asked are:

• public_transport=platform without any vehicles given
• railway=platform without any vehicles given
• highway=bus_stop without any vehicles given, who also does not have public_transport=platform as a parent

Thanks for adding images.

• Please replace the following images with these:
  tram: https://commons.wikimedia.org/wiki/File:Moscow,_Zagorodnoe_Highway_tram_stop_June_2022_03.jpg
  subway: https://commons.wikimedia.org/wiki/File:Kyoto_subway_2831_Matsugasaki_20220506.jpg
  bus: https://commons.wikimedia.org/wiki/File:20190918_Oxford_Bus_841.jpg

• Is there a particular reason why you use the png file format for photographs? If not please use jpg.

• The shortest side of an image needs to be (at least) 2000px and the file size usually should be between 1 and 2 MB, please take this into consideration.

• If you need to crop an image please keep the aspect ratio of the original (often 5:4) or use 1:1

• Also please remove the prefix mode_of_transportation_ in the filenames.

• The shortest side of an image needs to be (at least) 2000px and the file size usually should be between 1 and 2 MB, please take this into consideration.

Done. I was orienting myself at the suggestions made here
I updated the pictures where possible so that the shortest side is always at least 2000px. I choose quality settings that made every image (where possible) approx. 1.5 Mb in size.

• If you need to crop an image please keep the aspect ratio of the original (often 5:4) or use 1:1

Changed. I thought it would be more important to have a consistent aspect ratio between all images of a question than to not change it in regards to the original.

Should be ready for re-review.

Thanks for updating the PR.

• The shortest side of an image needs to be (at least) 2000px and the file size usually should be between 1 and 2 MB, please take this into consideration.

Done. I was orienting myself at the suggestions made here I updated the pictures where possible so that the shortest side is always at least 2000px. I choose quality settings that made every image (where possible) approx. 1.5 Mb in size.

Sorry, my bad. All images I contribute had a side length of 2000px. So the "at least" in my first comment was somewhat contradicting to your reference.

• If you need to crop an image please keep the aspect ratio of the original (often 5:4) or use 1:1

Changed. I thought it would be more important to have a consistent aspect ratio between all images of a question than to not change it in regards to the original.

That's right, but why choosing 16 by 9 and not keeping the original ones. As most image sensors have a very similar aspect ratio anyway.