[OSM-talk] UK: Trunk-Primary
richard at systemeD.net
Mon Aug 13 10:01:41 BST 2007
Ben Robbins wrote:
> The question is what matters? What matters in my opinion is being
> able to use the maps to plan a journey, and dividing the A roads by
> management does this indirectly, as HA roads are a lot faster nearly
> always (don't list exceptions please),
I'd concur with Tom. There is virtually no use for the average driver
in knowing who runs a given road.
HA roads (which are now called "strategic", not "trunk", except for
legislative purposes) are inter-city routes suitable for all traffic
(e.g. high HGVs), not fast ones per se. All the trunk roads in the
Marches, for example, are way slow, often slower than the alternative
routes (A40 Gloucester-Ross? Ha!). And whether inter-city is useful
rather depends on whether you're going from one city to the other.
The difference between "primary A" (green), "non-primary A"
(black/white), and B, however, is much, much more significant to the
If you really want to note who runs UK roads, I suggest you use something like
management=Midlands Expressway Ltd
management=UK Roads Ltd
management=Leicestershire County Council
and then, in the rare case that you wanted to highlight those managed
by a specific organisation, you could match on that tag. But bear in
mind that _no_ UK maps now differentiate trunk/HA-managed roads in
that way. Even the OS has abandoned the A34(T) notation for trunk
roads on its maps, and just shows them the same as other primary A
Certainly, navigable waterways could do with a management tag:
management=Manchester Ship Canal Company
and I guess railways, too (Network Rail, TfL...).
As said before, I rather like the Michelin approach, which is that
they ignore classifications entirely and classify roads by their own
objective, worldwide standards (one of which, for example, appears to
be grade-separated junctions with high-speed entrances and exits). But
I can't see that happening easily here.
> 3) Primary Roads, roads which arent HA, and don't have green signs.
No. That's wrong. All primary A roads have green signs _except_ where
the authority has made a mistake. Local authorities are very bad at
More information about the talk