Also looking for guidance on this. I've seen a draft 'factsheet' from a local authority quoting a 1.5m gap for cycles is reduced to 1.2m for HVM, but no source or further advice on height/visibility. In Edinburgh and Manchester the Surface Guard barriers have been used for active travel permeability

In late 1956, the final trams were removed. Asphalt replaced setts on Princes Street, ripping up the tram rails in the process. The space became dominated by bus and motorcar. [4/4]