[Tagging] Clarification unclassified vs residential

[Paul Johnson]

Honestly couldn't hurt the cycleways to have a better model than just path
and cycleway, since some networks can get quite complex (consider quietways
and cycle superhighways; or the multitiered systems in The Netherlands, for
example).

On Tue, Feb 26, 2019 at 6:39 AM Paul Allen <pla16021 at gmail.com> wrote:

> On Tue, 26 Feb 2019 at 12:17, Fernando Trebien <fernando.trebien at gmail.com>
> wrote:
>
>>
>> I don't think a uniform, worldwide highway class standardisation based
>> on road attributes is possible and satisfactory. But I think a
>> functional one would be, at least as a guiding principle.
>>
>
> What we currently have doesn't reflect reality too well, even in the UK.
> It makes the
> assumption that the width/capacity/speed of a road correlates well with
> its classification.
> Of course, we have lanes and speed limits to refine matters, but there is
> still the implicit
> assumption by many mappers that a primary route is "better" than a
> secondary route.
>
> It's sort of true, in the UK, most of the time.  But it is possible for a
> primary route in the UK
> to have fewer lanes or lower speeds for part of its length than a
> secondary route between the
> same two locations.  Unlikely, but possible.  Road classifications in the
> UK are essentially
> hints to the routeing algorithm in drivers' heads.  A primary route from A
> to B is generally
> preferable to a secondary route because of a combination of factors
> including speed, width,
> straightness, length, junctions (lights or roundabouts), surface, and
> signage.  On any single
> one of those metrics the secondary may be better than the primary, but
> overall the primary
> is preferable.  A secondary route in one locality may be better in all
> respects than the primary
> in a different locality but that route is a primary because it is the best
> route (for some values
> of "best") betweentwo important locations.
>
> Is this a good way to model thing?  Probably.  Because anyone in the UK
> looking to get from A to
> B will consider primary routes first, trusting that the authorities have
> evaluated matters and that
> the primary routes are (normally) the best routes to choose.  It's not
> perfect, which is why satnavs
> usually offer the choice of looking for the fastest or shortest route.
> But if all you have is a paper map,
> then knowing which are primary and secondary routes is useful.
>
> --
> Paul
>
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