<div dir="ltr">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.<br></div><div class="gmail_extra">
<br><br><div class="gmail_quote">2014-08-10 19:52 GMT+04:00 fly <span dir="ltr"><<a href="mailto:lowflight66@googlemail.com" target="_blank">lowflight66@googlemail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Can't we use traffic_calming=hump for this situation or some barrier=*?<br>
<br>
cu fly<br>
<br>
Am 10.08.2014 16:23, schrieb Colin Smale:<br>
<div><div class="h5">> No need to define it as UK-only... such bridges occur across the whole<br>
> world, I am sure. The UK may be unique by having a specific road sign,<br>
> which may indicate that a bridge could/should be tagged as a humpback<br>
> (as stated in the wiki[1]). There is also a sign for explicitly<br>
> indicating a "risk of grounding" often seen at railway crossings.<br>
><br>
> In the UK it can be made objective by linking the use of the tag to the<br>
> presence of the sign, but then we would miss the many bridges which "the<br>
> average person" would call a hump bridge but are not signed as such.<br>
><br>
> I would suggest something like "a bridge requiring driving speed to be<br>
> reduced due to the vertical profile" (i.e. not because it is narrow, or<br>
> some other attribute).<br>
><br>
> Not sure this depends on who is driving by the way, the laws of dynamics<br>
> apply to all of us equally. But I agree that calculating whether a<br>
> particular truck can pass a particular bridge is not easy to put into<br>
> simple tags. It can be rather complex, which is why products like [2] exist.<br>
><br>
> --colin<br>
><br>
> [1] <a href="http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_Kingdom" target="_blank">http://wiki.openstreetmap.org/wiki/Road_signs_in_the_United_Kingdom</a><br>
><br>
> [2] <a href="http://www.autopath.co.uk/" target="_blank">http://www.autopath.co.uk/</a><br>
><br>
><br>
><br>
><br>
><br>
> On 2014-08-10 15:34, Никита wrote:<br>
><br>
>> I'm fine with this tag being used in UK. But I care about it's<br>
>> definition. If this tag will be interesting only in some territory,<br>
>> why not to define this tag specific to UK? You didn't answer how we<br>
>> should define "humpiness" of bridge?.. Is this you who minority and<br>
>> cannot pass this bridge without speed reduction or it is me who can<br>
>> drive everywhere at regular speed? This is really subjective.<br>
>><br>
>><br>
>> 2014-08-10 16:47 GMT+04:00 Yves <<a href="mailto:yvecai@gmail.com">yvecai@gmail.com</a><br>
</div></div>>> <mailto:<a href="mailto:yvecai@gmail.com">yvecai@gmail.com</a>>>:<br>
<div class="">>><br>
>> There is a lot of things not of interest to the majority of users<br>
>> in OSM, this is why it is rich.<br>
>> Yves<br>
>><br>
>><br>
>> On 10 août 2014 12:41:22 UTC+02:00, Colin Smale<br>
</div><div><div class="h5">>> <<a href="mailto:colin.smale@xs4all.nl">colin.smale@xs4all.nl</a> <mailto:<a href="mailto:colin.smale@xs4all.nl">colin.smale@xs4all.nl</a>>> wrote:<br>
>><br>
>> On 2014-08-10 12:13, Никита wrote:<br>
>><br>
>> I.e they define this tag as subtype of<br>
>> <a href="http://en.wikipedia.org/wiki/Arch_bridge" target="_blank">http://en.wikipedia.org/wiki/Arch_bridge</a> [5]. I don't see<br>
>> any real<br>
>> application/use to bridge=humpback. Also, bridge=humpback<br>
>> does not<br>
>> imply covered=yes by default. It does not define routing<br>
>> aspects or<br>
>> adds any features to end users.<br>
>><br>
>><br>
>> In the UK there are warning signs for some humpback bridges,<br>
>> and with<br>
>> good reason - if you don't slow down substantially from the<br>
>> ambient<br>
>> speed you will be launched into orbit. Therefore they should<br>
>> be useful<br>
>> for routers, implying a lower speed on that part of the road.<br>
>><br>
>> <a href="https://uk.answers.yahoo.com/question/index?qid=20120222085933AAsnJiP" target="_blank">https://uk.answers.yahoo.com/question/index?qid=20120222085933AAsnJiP</a><br>
>><br>
>> Some are so "humpy" that a vehicle with a long gap between the<br>
>> axles<br>
>> and/or a low ground clearance (e.g. a low-loader) may actually<br>
>> be unable<br>
>> to cross the bridge.<br>
>><br>
>> So I don't think it is right to say that bridge=humpback<br>
>> cannot be of<br>
>> value for routing or end users...<br>
>><br>
>> --colin<br>
>><br>
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