[Tagging] bridge=humpback ?
Никита
acroq3 at gmail.com
Sun Aug 10 16:12:34 UTC 2014
I will be fine with bridge=yes, traffic_calming=humpback. But again, as
Colin Smale said, we will miss unmarked bridges, without signs. barrier=*
is not option here, there no block in any form.
2014-08-10 19:52 GMT+04:00 fly <lowflight66 at googlemail.com>:
> Can't we use traffic_calming=hump for this situation or some barrier=*?
>
> cu fly
>
> Am 10.08.2014 16:23, schrieb Colin Smale:
> > No need to define it as UK-only... such bridges occur across the whole
> > world, I am sure. The UK may be unique by having a specific road sign,
> > which may indicate that a bridge could/should be tagged as a humpback
> > (as stated in the wiki[1]). There is also a sign for explicitly
> > indicating a "risk of grounding" often seen at railway crossings.
> >
> > In the UK it can be made objective by linking the use of the tag to the
> > presence of the sign, but then we would miss the many bridges which "the
> > average person" would call a hump bridge but are not signed as such.
> >
> > I would suggest something like "a bridge requiring driving speed to be
> > reduced due to the vertical profile" (i.e. not because it is narrow, or
> > some other attribute).
> >
> > Not sure this depends on who is driving by the way, the laws of dynamics
> > apply to all of us equally. But I agree that calculating whether a
> > particular truck can pass a particular bridge is not easy to put into
> > simple tags. It can be rather complex, which is why products like [2]
> exist.
> >
> > --colin
> >
> > [1] http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_Kingdom
> >
> > [2] http://www.autopath.co.uk/
> >
> >
> >
> >
> >
> > On 2014-08-10 15:34, Никита wrote:
> >
> >> I'm fine with this tag being used in UK. But I care about it's
> >> definition. If this tag will be interesting only in some territory,
> >> why not to define this tag specific to UK? You didn't answer how we
> >> should define "humpiness" of bridge?.. Is this you who minority and
> >> cannot pass this bridge without speed reduction or it is me who can
> >> drive everywhere at regular speed? This is really subjective.
> >>
> >>
> >> 2014-08-10 16:47 GMT+04:00 Yves <yvecai at gmail.com
> >> <mailto:yvecai at gmail.com>>:
> >>
> >> There is a lot of things not of interest to the majority of users
> >> in OSM, this is why it is rich.
> >> Yves
> >>
> >>
> >> On 10 août 2014 12:41:22 UTC+02:00, Colin Smale
> >> <colin.smale at xs4all.nl <mailto:colin.smale at xs4all.nl>> wrote:
> >>
> >> On 2014-08-10 12:13, Никита wrote:
> >>
> >> I.e they define this tag as subtype of
> >> http://en.wikipedia.org/wiki/Arch_bridge [5]. I don't see
> >> any real
> >> application/use to bridge=humpback. Also, bridge=humpback
> >> does not
> >> imply covered=yes by default. It does not define routing
> >> aspects or
> >> adds any features to end users.
> >>
> >>
> >> In the UK there are warning signs for some humpback bridges,
> >> and with
> >> good reason - if you don't slow down substantially from the
> >> ambient
> >> speed you will be launched into orbit. Therefore they should
> >> be useful
> >> for routers, implying a lower speed on that part of the road.
> >>
> >>
> https://uk.answers.yahoo.com/question/index?qid=20120222085933AAsnJiP
> >>
> >> Some are so "humpy" that a vehicle with a long gap between the
> >> axles
> >> and/or a low ground clearance (e.g. a low-loader) may actually
> >> be unable
> >> to cross the bridge.
> >>
> >> So I don't think it is right to say that bridge=humpback
> >> cannot be of
> >> value for routing or end users...
> >>
> >> --colin
> >>
> >>
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