It's very unlikely that the restriction here is maxweight=*, unless it's for a weak bridge or weak road and had traffic signs which are pre-1994.

As this changeset and others have a comment about truck restrictions, the tagging you need is almost certainly maxweightrating:hgv=* + maxweightrating:hgv:conditional=*

See https://community.openstreetmap.org/t/maxweight-meaning-and-maxweightrating/132190/9