[Talk-GB] Tagging modal filters and school streets

[Robert Skedgell]

Would it be worth adding something like traffic_intervention:website to
link to the relevant traffic order in The Gazette (an OGL source) or the
relevant highway authority's website?

On 27/09/2020 00:53, Stephen Colebourne wrote:
> Here is the outline proposal:
> 
> """
> The traffic_intervention tag is used to identify locations where roads
> have been closed to general traffic for the purpose of preventing
> undesirable through traffic.
> 
> The traffic_calming tag covers many use cases where the road is open
> but something physical has been added to slow down traffic. Sometimes
> however, the local traffic authority goes further and closes a road to
> through traffic - traffic_intervention is used to record these
> interventions. Mappers should ensure that all normal tags are still
> applied to the relevant road segment, traffic_intervention is intended
> to be used in addition to existing tags to capture the semantic
> meaning.
> 
> traffic_intervention=modal_filter
> A modal filter is a road closure that is designed to allow certain
> modes of transport through, typically bicycles and pedestrians. It is
> intended for short sections of road that used to be open to general
> traffic and are no longer. The standard modal filter that allows
> cycles should be mapped as follows:
> * A way representing the section of road that is closed to general traffic:
> highway=cycleway, traffic_intervention=modal_filter, other tags as
> necessary, especially including the road name.
> * A barrier in the middle of the way representing what is being used
> to close the road. For example:
> barrier=bollard, foot=yes, bicycle=yes
> 
> traffic_intervention=bus_gate
> A bus gate is a short section of road that has been closed to general
> traffic but is open to buses, bicycles and pedestrians. It should be
> mapped as a bus road would be, but with the additional
> traffic_intervention tag.
> * A way representing the section of road that is closed to general traffic:
> highway=service, bus=yes, bicycle=yes, foot=yes, traffic_intervention=bus_gate
> 
> traffic_intervention=school_street
> A school street is a section of road near a school that is closed to
> general traffic, often only at certain times of day. The access
> restrictions are normally mapped using motor_vehicle:conditional.
> Simply use traffic_intervention=school_street to add the additional
> semantic meaning.
> 
> Mappers may additionally specify the year, month or full date when the
> road was restricted if known:
> traffic_intervention:date=<year>
> traffic_intervention:date=<year-month>
> traffic_intervention:date=<year-month-day>
> 
> """
> 
> Example modal filter: https://www.openstreetmap.org/way/851872727
> Example bus gate: https://www.openstreetmap.org/way/851872729
> 
> What do people think? Should this be put forward to the tagging list?
> Would anyone here use this scheme?
> 
> Stephen
> 
> 
> 
> On Mon, 21 Sep 2020 at 18:20, Stephen Colebourne <scolebourne at joda.org> wrote:
>>
>> Given we have hundreds of existing and new modal filters* and school
>> streets**, I think we could do with having a *high level* tag for them
>> that captures the concept.
>>
>> Currently, these are hard to find as they can be represented in many
>> ways. eg. for modal filters:
>> - highway=cycleway
>> - highwat=footway
>> - highway=service/residential with motor_vehicle=no
>> - plus potential associated barrier=xxx
>>
>> School streets are no more than a motor_vehicle:conditional=no @ (xxx)
>> which again loses the semantic meaning.
>>
>> What I'd like is a new tag that captures the high level concept. It
>> would be a bit like traffic_calming, but I don't think that adding
>> more values to that is appropriate. Any new value would go on the way
>> that is no longer open. These are generally verifiable on the ground,
>> even for filters that were added in the 1970s.
>>
>> Unfortunately, I don't have a great name. "traffic_restrictions" is
>> taken as is "traffic_control". My best suggestion is
>> "traffic_intervention=modal_filter"/"school_street", as they are
>> essentially interventions by local government to better manage the
>> street space.
>>
>> Any thoughts?
>> Stephen
>>
>> * a "modal filter" is a place where the road is closed, or made one
>> way for the purposes of controlling traffic, such as to stop rat
>> running. It is commonly linked to Low Traffic Neighbourhoods (LTNs)
>> but they have been around for 50 years, and are generally easy to
>> spot.
>>
>> ** a "school street" is a street that is only accessible by residents
>> at school drop-off and pick-up time
> 
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