[Tagging] barrier enforcing maxwidth

[Paul Johnson]

On Mon, Sep 7, 2015 at 10:38 PM, 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.
>

This sounds like a good place to implement enforcement relations
<http://wiki.openstreetmap.org/wiki/Relation:enforcement>.

type=enforcement
enforcement=maxwidth
maxwidth=1.9m

In this case, it sounds like the "device" and "force" members could very
well be the same object.
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