Yes, this is the core of the issue. designated does not make sense as an access value. It seems people have been pointing this out since 2008. We should have a parallel scheme to specify the transport mode a way is designed/intended/designated to be to used by. Something like designated:for=moped;carriage;horse;etc would make sense if data consumers could be counted on to reliably parse semicolon delimited values.
3 Likes