maraf24
By "inner road" you mean "Droga wewnętrzna"?
I don't think you'll be able to fix your problem by editing this map. The OSM is not so popular and this road was already marked as small local road. 
However, it was recently updated and it is not longer routable: http://www.openstreetmap.org/directions?engine=osrm_car&route=54.3033%2C18.5828%3B54.3014%2C18.5869#map=15/54.3033/18.5937