[OSM-talk-be] Road status & width (was: Humbeeksesteenweg tertiary or secondary road ?)

[André Pirard]

On 2014-03-10 13:37, Marc Gemis wrote :
> The Humbeeksesteenweg (N211a) was tagged as a tertiary road.
> Recently OsmAnd_pieter changed this to secondary.
>
> http://www.openstreetmap.org/way/144119601/history
>
> Is this correct ?
>

According to IGN/NGI and the reasoning below, Benedestraat N211a is
(officially) a secondary road.

The first question is; what is a "primary/secondary/tertiary road?".
And why is it useful to know? To make better GPS routing?

Tertiary roads are smaller roads used to reach villages or small towns
but not go through them.
Secondary roads are used to go through them, that is, to travel across
the country.
In theory, national roads have a N... number, but their primary status
is often very debatable...

Belgian national is an administrative classification, but...
There is a national->normally primary road nearby.
Lorries cannot pass (cross) each other without overlapping on the verge.
There's an alternative wider, officially secondary road: no lorry problem.

The IGN/NGI maps (viewable on their browser
<http://www.ngi.be/testbed/pages>) legend (see below) uses a "status"
and a "profile" (width) classification.  The width seems to be used for
local roads only.  The tentative correspondence with OSM is as follows:

IGN/NGI
	OSM
motorway
	motorway
national
	primary
link
	secondary
local
	tertiary or residential


Can you please see if this correspondence makes sense in your neighborhood?

But the real "best GPS route" information in my eyes is *to map the
width* of the road.
(and to use the administrative classification only for the number and
adorning).

**So, what about, in addition to using this correspondence,*measuring
and starting tagging all road widths exactly in Belgium*, and not only
local roads?
It's really easy to do, it would be original work, reliable data, it's
very useful and it would give Julien Fastré something to trade for using
the Wallonia data!!!  For if we cannot sell OSM data, we can say that we
will do something only if we get that data (to map the roads we measure) ;-)

IGN legend

Cheers,

André.






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