Nov 13, 2020, 10:16 by p...@trigpoint.me.uk: > On Fri, 2020-11-13 at 08:36 +0000, Peter Neale via Talk-GB wrote: > >> I am pretty sure that I remember checking bridges in my area some time ago, >> using a tool that someone kindly provided, which flagged up all bridges, >> where the clearance height was not specified in OSM. >> >> I regret that I cannot now find the link. >> >> >> > > The isssue with a tool which finds roads under bridges with no maxheight tag > is that many are above a legal minimum so have no sign. > > Motorway bridges for example. > > Maybe we need an unsigned tag so that these can be elimiated? > > A hay lorry managed to hit this (unsigned) one a few years ago. > StreetComplete is using maxheight=default maxheight=below_default for unsigned maxheight in places where there is some height limit (for example within tunnels). See https://wiki.openstreetmap.org/wiki/Key:maxheight#Non-numerical_values for some alternative tagging styles And extending this quest to roads under bridges was recently implemented, though this is not released yet. See https://github.com/westnordost/StreetComplete/pull/2234 for code.
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