[Talk-GB] Access restrictions for lorries above a certain GVM

[Philip Barnes]

On Wed, 2018-09-26 at 17:18 +0100, Tony Shield wrote:
> 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.

I have never known such a restriction to be only in one direction. But
Jerry's suggestion to map the signs is good as we can then build up the
zones in the same way that we build speed limit zones.

Phil (trigpoint)

> 
> 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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> > Talk-GB at openstreetmap.org
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> 
> 
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