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What sort of traffic calming is here? (for nodes, ways, areas tagged traffic_calming=yes) #2742

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dbdean opened this issue Apr 14, 2021 · 24 comments · Fixed by #3380
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new quest accepted new quest proposal (if marked as blocked, it may require upstream work first)

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@dbdean
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dbdean commented Apr 14, 2021

General

Affected tag(s) to be modified/added: traffic_calming
Question asked: What sort of traffic calming device is here?

Checklist

Checklist for quest suggestions (see guidelines):

  • 🚧 To be added tag is established and has a useful purpose
  • 🤔 Any answer the user can give must have an equivalent tagging (Quest should not reappear to other users when solved by one)
  • 🐿️ Easily answerable by everyone from the outside but a survey is necessary
  • 💤 Not an overwhelming percentage of elements have the same answer (No spam)
  • 🕓 Applies to a reasonable number of elements (Worth the effort)

There are currently around 14k nodes tagged as traffic_calming = yes: https://taginfo.openstreetmap.org/tags/traffic_calming=yes

Ideas for implementation

Replace traffic_calming=yes with the common values from https://wiki.openstreetmap.org/wiki/Key:traffic_calming

@arrival-spring
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This would need some good pictures/diagrams to make clear the difference between things like bump, hump and cushion. The descriptions on the wiki makes it clear enough, but that's too much text to go in the app.

@westnordost westnordost added the new quest accepted new quest proposal (if marked as blocked, it may require upstream work first) label Apr 14, 2021
@westnordost
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But in general, this could work. As @arrival-spring said, will depend on the quality of the images / illustrations.

@rhhsm
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rhhsm commented Apr 15, 2021

Would be good to also ask for zebra crossings if they are raised (traffic light-regulated ones should possibly be excluded).

@matkoniecz
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As nearly all the work here will be selecting value, finding good short descriptions (sometimes repeating OSM tag is not the best idea) and finding images.

If someone is irritated by manual image resizing - I am using https://github.com/matkoniecz/rescaling_for_android to avoid doing this manually.

@matkoniecz
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List of potential values like one in #2739 (comment) may be a potential first step (and requires no coding).

Note that different values may apply to nodes/ways/areas.

@FloEdelmann
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Most commonly used (apart from yes and no):


bump
(241k usages)

hump
(180k usages)

table
(113k usages)

island
(69k usages)

cushion
(26k usages)

choker
(21k usages)

rumble_strip
(18k usages)

chicane
(14k usages)

dip
(4k usages)

Additional possible options:


painted_island
(309 usages, no wiki entry)

mini_bumps
(170 usages)

choked_table
(162 usages, bad image)

double_dip
(115 usages)

choked_island
(37 usages, bad image)

dynamic_bump
(19 usages)

The images are linked to their respective source. Please suggest better images if you have any!

@westnordost
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Is island really used that much on the road way? I've seen instances where someone drew a polygon and tagged it like that.

The photos are TBH all not that helpful in my opinion. there is too much else in the picture

@RubenKelevra
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I feel like there's one missing which is pretty common here in NRW, Germany in my area.

While the whole street is paved with asphalt, the intersection is paved with red paving stones. One this visual differentiate the intersection and also the rumbling from the paving stones avoid that people drive too fast.

Not sure if there's a tag for this. I mainly just used the surface tag so far for that.

Here's an example:

https://www.volksfreund.de/region/konz-saarburg-hochwald/rote-pflastersteine-an-der-kreuzung_aid-5522097

@RubenKelevra
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Also, it makes sense to completely disable this quest for the Nederlands as long as we have no feedback from mappers from the Netherlands if this makes sense. Reason being that the Nederlands have traffic calming built into their national guidelines for constructing roads. It's basically everywhere.

So maybe they map streets without any traffic calming rather than marking each traffic calming infrastructure which is put somewhere.

@matkoniecz
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So maybe they map streets without any traffic calming rather than marking each traffic calming infrastructure which is put somewhere.

In such case it will not be asked ("for nodes, ways, areas tagged traffic_calming=yes").

Though if traffic_calming=yes is used on entire highway=* then such case should be likely excluded (not checked is such tagging used at all).

@peternewman
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Would be good to also ask for zebra crossings if they are raised (traffic light-regulated ones should possibly be excluded).

There are at least some traffic light regulated ones with a raised crossing, there was even a sign informing you of such I spotted on a recent walk.

@matkoniecz matkoniecz self-assigned this Sep 24, 2021
@matkoniecz
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Preliminary review:

From https://wiki.openstreetmap.org/wiki/Key:traffic_calming and https://taginfo.openstreetmap.org/keys/?key=traffic_calming#values

bump short bump
hump long bump
table Table (flat in the middle)
cushion long bump, not blocking buses (too long description!)
island Island
choker Narrowed road
chicane Deliberate sharp curve(s)
rumble_strip Rumble strip

@smichel17
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smichel17 commented Sep 24, 2021

Layperson chiming in: before this issue, while I was well aware of all of these structures individually, and that they belonged to a category of essentially "things to slow cars down for safety", I had no idea that the category was called traffic calming.

I am not suggesting you avoid the term; I think it's a good learning opportunity. However, I do think that the question should be obvious without relying on people to know the term in advance.

edit: to be clear, I'm not asking for any particular changes to the current state, just that you keep this in mind.

@peternewman
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While the whole street is paved with asphalt, the intersection is paved with red paving stones. One this visual differentiate the intersection and also the rumbling from the paving stones avoid that people drive too fast.

It's the same height as the main road surface then @RubenKelevra ? Those things are common in some parts of the UK, but they are also tables (i.e. the junction is at a raised height relative to the rest of the road).

bump short bump
hump long bump

They are/were nicknamed sleeping policemen in the UK, which may be a good way to differentiate between bump and hump (same size as a person lying down in the road).

cushion long bump, not blocking buses (too long description!)

I think the key thing is they don't cover the entire width of the road/lane. I believe the theory is that any vehicle driving at the correct speed rides over them fairly impact free (compared to a bump/hump), but you need to be going relatively slow to line up with them to do so.

@arrival-spring
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cushion long bump, not blocking buses (too long description!)

How about cushion long, narrow bump?

@matkoniecz
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I believe the theory is that any vehicle driving at the correct speed rides over them fairly impact free (compared to a bump/hump), but you need to be going relatively slow to line up with them to do so.

Ones that I know are serious bump to any car smaller than large pickup truck (except single tracked ones that can go to side).

Not sure is it theory vs practice or Poland vs functional road design...

@westnordost
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westnordost commented Sep 25, 2021

They are/were nicknamed sleeping policemen in the UK

And incorruptable policeman in India. Mostly just the short ones, IIRC.

Anyway, is it necessary to actually name them when we show pictures of them?

@matkoniecz
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matkoniecz commented Sep 28, 2021

One tricky part is that I will need speed bump and hump images that do not differ by construction type. So all should be from asphalt, or plastic or something else. Otherwise people WILL become confused and mark based on material, not geometry/type.

so either asphalt hump and bump (ideally also table):

or plastic bump and hump (ideally also table):

or paving stone hump and paving stone bump (ideally also table):

  • bump - TODO, help welcomed - though at least by spring I would be able to take a picture
  • hump -TODO - help definitely welcomed
  • table - TODO, help welcomed - though at least by spring I would be able to take a picture

Or maybe use icons? Something like

480px-Speed_hump_(3000986949)

https://commons.wikimedia.org/wiki/File:Znak_A-11a.svg (bump)
https://commons.wikimedia.org/wiki/File:France_road_sign_C27.svg (hump)

Sources for more thorough review:

https://commons.wikimedia.org/wiki/Category:Speed_cushions
https://commons.wikimedia.org/wiki/Category:Speed_bumps
https://commons.wikimedia.org/wiki/Category:Speed_humps - especially https://commons.wikimedia.org/wiki/Category:Speed_humps_in_Canada
https://commons.wikimedia.org/wiki/Category:Speed_tables

mini bumps: https://commons.wikimedia.org/wiki/File%3AZ%C5%82otniki%2C%5Ful%2E%5FPaw%C5%82owicka%2C%5Fpr%C3%B3g%5Fzwalniaj%C4%85cy%2EJPG (not planning to support but collecting images just in case)

@peternewman
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Anyway, is it necessary to actually name them when we show pictures of them?

I thought the consensus had been that pictures would be a challenge to differentiate.

@matkoniecz I'm impressed they're constructing plastic tables and paving bumps near you! Most of the ones near me are asphalt for the smaller bits and paving for the larger stuff. I may be able to get some pictures of them and cushions at some point.

@westnordost
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westnordost commented Sep 29, 2021 via email

@matkoniecz
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matkoniecz commented Sep 29, 2021

I figured out how to get image list from supernested Commons categories:

https://petscan.wmflabs.org/?max_age=&cb_labels_yes_l=1&interface_language=en&negcats=Diagrams%20of%20road%20signs%0A&categories=Speed%20bumps%0A&edits%5Bflagged%5D=both&edits%5Banons%5D=both&since_rev0=&language=commons&project=wikimedia&cb_labels_any_l=1&cb_labels_no_l=1&langs_labels_no=%C2%AEexp_filter=&edits%5Bbots%5D=both&search_max_results=500&depth=100&ns%5B6%5D=1&wikidata_prop_item_use=

I tried excluding also Monochrome photographs category, but that often crashes petscan

Speed tables: https://petscan.wmflabs.org/?&edits%5Bflagged%5D=both&cb_labels_yes_l=1&langs_labels_no=%C2%AEexp_filter=&language=commons&since_rev0=&negcats=Diagrams%20of%20road%20signs%0ARaised%20pedestrian%20crossings&depth=100&edits%5Bbots%5D=both&project=wikimedia&cb_labels_no_l=1&edits%5Banons%5D=both&categories=Speed%20tables%0A&cb_labels_any_l=1&search_max_results=500&ns%5B6%5D=1&interface_language=en&&doit=

Speed table, very humpish: https://commons.wikimedia.org/wiki/File%3ARozvodova%5Fstr%2C%5FPrague%5FMod%C5%99any%2Ejpg

https://commons.wikimedia.org/wiki/File%3APr%C3%B3g%5Fzwalniaj%C4%85cy%5F01%2EJPG - between hump and table

https://commons.wikimedia.org/wiki/File%3ABremsschwelle%2EJPG

https://commons.wikimedia.org/wiki/File%3AStades%5Fde%5FChevreuse%5F2010%5F4%2Ejpg seems flat on photo

Traffic island: tried Traffic islands without Refuge islands but petscan keeps falling over ( magnusmanske/petscan_rs#107 ).

@matkoniecz
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matkoniecz commented Oct 14, 2021

Current state: I am mostly unhappy with most images and will likely get back to putting labels on them.

Yes, shapes will be fixed.

Some of used images are impossible to use due to inability to square them (especially island)

screen03

westnordost added a commit that referenced this issue Oct 15, 2021
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