[Talk-us] What is the meaning of hgv:national_network=yes/terminal_access?

[Joseph Eisenberg]

Thank you, that suggests that the apparent increase in usage since
2012 is due to splitting existing ways. I'll mention this on the wiki
page, since it's not something you can see in the Taginfo numbers.

On 8/6/19, Paul Norman via Talk-us <talk-us at openstreetmap.org> wrote:
> On 2019-08-04 7:56 a.m., Joseph Eisenberg wrote:
>> I've found this undocumented tag, used 130,000 times, almost
>> exclusively in the USA.
>>
>> https://taginfo.openstreetmap.org/keys/hgv%3Anational_network#overview
>>
>> Values: yes 86.56%   terminal_access 13.37%
>>
>> I thought it might be imported from Tiger, but the usage has increased
>> gradually since 2012: 60k more ways have been tagged in that time.
>
> If you look at the length, it increased to 100000 km in Nov 2011, and to
> 132000 km in Nov 2012. Aside from those sudden increases, there has been
> no change in usage.
>
>> How are these tags being used?
>
> They're not.
>
>> I'm guessing that hgv:national_network=yes means that a road is
>> designated for heavy trucks to use for long-distance trips.
>
> It means that it has a particular designation for budget purposes with a
> department of the federal government.
>
> If I'm recalling correctly, these tags were invented by NE2 and never
> subject to any discussion, no data consumers use them, and they are
> poorly documented.
>
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