Hi,

I'm a little confused with what you're trying to do here, i think you should read the wiki page for the layer tag: https://wiki.openstreetmap.org/wiki/Key:layer?uselang=en, specifically the "Features at layer 0 should not normally have a layer tag." and "Use the smallest suitable layer value. Only use layer=2 for a bridge that passes over a feature that is already at level 1"