Hi,
My understanding is that a feature directly under another feature (in this case a bridges tagged layer=1) should be one layer less than layer=1, which is layer=0, which in it's absence, is implied as layer=0. 

Way: Utrechtsebaan (7474878) is directly under twelve features, bridges tagged as layer=1. Thus, I assume that with no layer tag at all, layer=0 is implied. Way:Utrechtsebaan (7474878) is not tagged as a tunnel.

My apologies if I'm wrong but I can't see why.

Regards Bernard.

