After some time, I came across to this note again. 

At that time I was starting to edit OSM, and I did not know many details. Thank you Layft Greater for your comments. 

Now, I had a look at street views, edited it (ensuring for example "crossing=traffic_signals"), and I think that everything is ok. 

Unless you have any comment, I will close notes #4408737 and #4408738.

Cheers!