Hi,

I've reverted your edit. What's on a brdige is all layer=1 + bridge=viaduct and what passes below does then not need a layer=-1. IF it is at layer=-1 then you need to tell why, but you removed the tunnel tag. Notable, since you did a survey, many rail underpasses in Pescara are signed 'ponte basso' because the maxheight is below the legal 4.8m requiring a sign. Since the height is not signed here added maxheight:signed=no, so route planners know that the height is at least a minimum of 4.8m

happy mapping.