[Tagging] bridge=humpback ?

[Colin Smale]

It is neither constructed with the intention of calming traffic, nor is
it intended as any kind of barrier (a bridge is usually exactly the
opposite!) Let us not be afraid of using a different tag for what is
clearly a different attribute. 

--colin 

On 2014-08-10 17:52, fly wrote: 

> 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 [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 [2]] exist. --colin [1] http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_Kingdom [1] [2] http://www.autopath.co.uk/ [2] 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 [3] [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 [4] 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 ------------------------------------------------------------------------ Tagging mailing list Tagging at openstreetmap.org <mailto:Tagging at openstreetmap.org>
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Links:
------
[1] http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_Kingdom
[2] http://www.autopath.co.uk/
[3] http://en.wikipedia.org/wiki/Arch_bridge
[4]
https://uk.answers.yahoo.com/question/index?qid=20120222085933AAsnJiP
[5] https://lists.openstreetmap.org/listinfo/tagging
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