Hi
What are we going to tag? The length of road/way with the restriction
and which lanes, or the placement of the sign as a node and with some
directionality.
From the examples given it seems that passing the facing sign is the
limiting event, the end of the restriction may be posted with a grey end
of restriction sign; surveying them could be a nightmare if the road/way
is tagged - the restriction can be several miles and in one direction.
Regards
Tony
On 26/09/2018 13:10, Mark Goodge wrote:
On 26/09/2018 12:35, Tobias Zwick wrote:
Hey there
I can't believe this didn't come up before - or maybe it did but was not
documented in the wiki.
In United Kingdom, how do you tag roads signed with this sign?
https://en.wikipedia.org/wiki/File:UK_traffic_sign_622.1A.svg
That's a good question. I've had a look, and none of them seem to be
tagged on the roads in my town.
Another issue is how we tag "gateway" weight restrictions. These apply
only to traffic in one direction, and not to an entire length of road.
They're typically used in towns and villages that have been by-passed,
to ensure that HGV through traffic has to use the by-pass, but, having
accessed the town via a legitimate route, can then leave it via
whichever is most convenient. Here's an example of what I mean:
https://www.markgoodge.com/files/by-pass.png
The primary route (in green) which originally passed through the town
has been diverted to by-pass it on a new construction. Junctions A and
B will have weight restriction signs (as above) on the route into
town, but junction C will not. So HGVs can enter the town via C, but
then leave via either A, B or C. The intention, of course, is to
ensure that only trucks which need to enter the town do so, as it
can't be used as a short-cut (eg, if the by-pass is congested), but
once in the town, there's no restriction on which parts of the town
the trucks can service.
I really don't know how we'd tag that, because it would be a tag that
only applies to one traffic direction of a way rather than the entire
way.
Note that the GVM for which the sign applies is given explicitly on the
sign, which is apparently always the case for any HGV-access-restriction
sign in the UK.
That's not a major issue. Although the limit is always stated, it's
also almost always 7.5t, as that's the boundary between different
categories of goods vehicle. With very few exceptions, it's just the
larger ones which are prohibited.
Mark
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