Hi blankmash, thanks for mapping! I noticed you have been adding barrier=kerb tags around Sofia. Some of those barriers intersect vehicle navigable roads in several places such as: https://www.openstreetmap.org/node/3063961711 and https://www.openstreetmap.org/node/1699465242.

It looks like you are trying to map places where there are footways meeting other highways where the kerb is not lowered. However, according to the OSM wiki page for barrier=kerb ( https://wiki.openstreetmap.org/wiki/Tag:barrier=kerb ), this tag should only be applied when “users of the carriageway (such as cars) have to drive over the kerb at this point.”  In the examples listed above, there is not an actual kerb that cars have to drive over so it should not be applied directly on the drivable highways.  A more appropriate way to map these would be something like at https://www.openstreetmap.org/node/10703091860, where there are barrier=kerb tags on the nodes on either side of the residential highway, but not directly on it, as described on https://wiki.openstreetmap.org/wiki/Key:kerb#On_a_node.  

Would you be willing to go back and resolve these issues so that they agree with OSM policy? 
 
Thank you, and let me know if you have any questions!