[Tagging] Drafting proposal: use oneway=reversible or create tag?

[Warin]

On 8/09/2015 12:43 PM, johnw wrote:
>
>> On Sep 8, 2015, at 9:46 AM, Warin <61sundowner at gmail.com 
>> <mailto:61sundowner at gmail.com>> wrote:
>>
>> Flow direction is the best of these (so far). It is descriptive of 
>> what is to be tagged.
>
> What do they use for pipelines? I imagine there is some tag based on 
> the way direction that can indicate flow.
>
>

I don't know. But I do know of one group of pipelines that are used in 
doth directions;

When electricity generation is required they flow water down hill to 
power electrical turbines.

When there is an excess of electrical generation they pump water uphill.

 From the pipeline wiki this looks to be used ...

flow_direction 
<https://wiki.openstreetmap.org/w/index.php?title=Key:flow_direction&action=edit&redlink=1>=forward/backward/both 
.. note that flow_direction is undocumented.
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