Unable to answer "What height limit is indicated below the bridge?" – Autovia Barcelona - Vic - Ripoll [C-17] (Motorway) – https://osm.org/way/482330630 via StreetComplete_ee 57.4:

There is no height limitation on the motorway, it is in the road bellow

Attached photo(s):
https://westnordost.de/p/214556.jpg