[Tagging] barrier enforcing maxwidth

[Andrew Errington]

I don't think a new tag is warranted.  maxwidth=* is fairly unequivocal.
If map users or routers want to interpret it as "max width, but probably
not really, there's probably a bit of extra space, I mean, who's going to
be that petty" then that's not your problem.

Since most roads do not have a maxwidth=* restriction it is safe to assume
that the road is suitable for any vehicle*, but if you add a maxwidth tag
somewhere it is immediately clear it was done purposefully.



On 8 September 2015 at 12:38, johnw <johnw at mac.com> wrote:

> I was driving in Chiba and Saitama yesterday and encountered a couple new
> types of barriers. I realized later one is traffic_calming=chicane.
>
>
> The other one is all over rural Japan as traffic_calming=choker on rural
> roads that could bypass traffic near the rivers, - but this one is not for
> traffic calming, it is for enforcement of maxwidth of the bridge, similar
> to barrier=hight_restrictor.
> . They put very strong steel poles or guardrails along the sides and
> center of the road at the maxwidth + 20 cm of a standard car.  car can pass
> (barely, my mirrors were 5 cm away from each pole), but a large dump truck
> cannot pass. Both are in areas where commercial dump trucks or other large
> vehicles are nearby, but this one is used to enforce access to the narrow
> bridge near a very very busy area to keep a massive traffic jam from
> occurring from a stuck dump truck.
>
> https://goo.gl/maps/8KUw7  The maxwidth is signed and guardrails are
> doing the job. This is width limited for the very narrow bridge in the
> background.
>
> https://goo.gl/maps/3NT9X  The other direction. Poles are used.
>
> Is this a reason for creating barrier=width_restrictor ?
>
>
> Javbw
>
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