[Talk-GB] traffic_intervention tag

[Steven Hirschorn]

Sorry, I'd forgotten who'd suggested them - I think they make possible a
useful distinction, especially for the ones that are more complex to define
like School Streets.

Maybe traffic_intervention=no_through_route? Or maybe access=destination is
enough, though I was hoping to differentiate between ones that had been in
place for decades and ones that are recent interventions.

On Sat, 14 Jan 2023, 16:37 Stephen Colebourne, <scolebourne at joda.org> wrote:

> On dates, there is one use of traffic_intervention:date which was
> previously suggested on this list IIRC.
>

Yes, this could work.


> For "modal_filter", I always intended this to mean "closed to all
> motor vehicles". Thus I would say a new value might make sense. But
> would "permit_only" be better than "access_only" ?
>

A modal filter is usually attached to a node because it stops the
prohibited traffic in that exact spot. This is still a modal filter because
it prevents motor traffic from using a road, apart from vehicles belonging
to the residents of the road, and vehicles carrying visitors or deliveries
to those residents. permit_only feels like an application has to be made in
advance.
I think the new ANPR enforced restrictions (which match access=destination)
allow traffic from either end of what used to be a through road as long as
that traffic doesn't enter the segment from one end and exit the other
within a specific time frame (usually a bit longer than it would take via
the primary/secondary/tertiary route.)



> When I originally defined this tag, my hope was that eventually the
> road-focussed map renderers might show the data, such as with red
> crosses or a red no entry icon. I do think the data has value over and
> above the basic facts about highway and access.
>
I agree, it's an easier query than looking for combinations of tags like
motor_vehicle:conditional, barrier=bollard (which often returns pavement
bollards too), access=destination, oneway=yes etc. It can also be extended
to the full extent of affected ways to be able to visualise the impact of
the infrastructure.

Steven
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