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Written by karussell on 2024-09-12 at 10:02

Maybe someone likes to improve the car or truck routing experience with #OpenStreetMap. I just compiled a list of ~3200 links that very likely highlight tagging issues. Either overlapping roads or missing turn restrictions.

https://gist.github.com/karussell/570a779c2340cd7c96d4a13b7baaccfb

Right click the map and click Query OSM to easily go to openstreetmap.org.

If someone is interested in another country than Germany or the entire planet - let me know.

See also this discussion: https://community.openstreetmap.org/t/118653

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Descendants

Written by karussell on 2024-09-23 at 09:50

updated list / map https://gist.github.com/karussell/31311d87785ae884ee15044c0ac5e798#file-a-list-of-tagging-issues-geojson

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Written by Nemo_bis 🌈 on 2024-09-12 at 10:07

@karussell Are these all in Germany?

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Written by karussell on 2024-09-12 at 10:16

@nemobis Yes, for now only Germany.

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Written by Peter on 2024-09-12 at 10:11

@karussell Could you indicate what the problem is with https://graphhopper.com/maps/?point=48.415107%2C11.634849&point=48.41561%2C11.634938&point=48.414178%2C11.633768&profile=car&layer=Omniscale

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Written by karussell on 2024-09-12 at 10:16

@pbb Probably nothing. I have a heuristic that searches for very small angles without a turn restriction. (unfortunately I made a mistake and need to re-run this to really cover the missing turn restrictions)

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Written by karussell on 2024-09-12 at 10:24

@pbb have updated the list (now it is also a bit smaller)

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Written by Peter on 2024-09-12 at 10:28

@karussell I would think this is allowed: https://graphhopper.com/maps/?point=48.106405%2C11.697063&point=48.10634%2C11.696902&point=48.106405%2C11.697063&profile=car&layer=Omniscale

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Written by karussell on 2024-09-12 at 10:30

@pbb Yes, this is allowed but this case here highlights an overlapping way problem:

https://www.openstreetmap.org/way/1304392264

https://www.openstreetmap.org/way/1154677977

This case is also not really a good example (it seems to be very common for area=yes and so I have this usually excluded). But see e.g. this one:

https://www.openstreetmap.org/way/98603597

https://www.openstreetmap.org/way/1221554189

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Written by karussell on 2024-09-12 at 10:33

@pbb or something like this:

https://www.openstreetmap.org/way/151704684

https://www.openstreetmap.org/way/391800066

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Written by Peter on 2024-09-12 at 10:38

@karussell Interesting with overlapping roads! That is indeed a problem that needs to be fixed.

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Written by Сhristiαn Ꙭ 🇪🇺 on 2024-09-12 at 10:17

@pbb @karussell u-turn?! I wonder, how do I prevent this taggingwise?

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Written by karussell on 2024-09-12 at 10:18

@ck2 @pbb the problems here are very likely missing normal left/right/straight turn restrictions (not u-turn restrictions - although there are restrictions for that as well)

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Written by Сhristiαn Ꙭ 🇪🇺 on 2024-09-12 at 10:26

@karussell @pbb If it is legally allowed to (u-)turn there shouldn't be any restrictions in the data. For truck routing there should probably be some kind of check in the routing algorithm whether an angle can be taken by the truck physically or not.

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Written by karussell on 2024-09-12 at 10:27

@ck2 Yes, in the specific case from @pbb there is probably no missing turn restriction.

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Written by Peter on 2024-09-12 at 10:25

@karussell While you're correct that most of the are missing turn restrictions, they are also very contrived and unrealistic examples. Remove the via-point on most (all?) examples, and you get the correct route.

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Written by karussell on 2024-09-12 at 10:26

@pbb yes, you are right. This is because of a recent change where we increase the u-turn costs a lot and this change made these problems here less severe.

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Written by Peter on 2024-09-12 at 10:39

@karussell For this example I can't see there is really any turn restriction in place. I wouldn't do it, but it does not seem forbidden: https://graphhopper.com/maps/?point=50.93701%2C6.984337&point=50.936639%2C6.985461&point=50.937098%2C6.984325&profile=car&layer=Omniscale Situation in Streetview: https://www.google.com/maps/@50.9369565,6.9845298,3a,75y,125.36h,87.82t/data=!3m6!1e1!3m4!1shNirJ2_70vW8qh2pjHDdZQ!2e0!7i16384!8i8192?entry=ttu&g_ep=EgoyMDI0MDkwOS4wIKXMDSoASAFQAw%3D%3D

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Written by karussell on 2024-09-12 at 10:45

@pbb Yeah, probably forbidden only for trucks :) ... every example would probably need a separate investigation if it is allowed or not. Still, your question is still legit as several of these examples are a bit unnatural and likely won't occur in real life.

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Written by Daniel on 2024-09-12 at 10:55

@karussell potentially related? 👀

https://www.openstreetmap.org/user/daniel-j-h/diary/41777

https://www.openstreetmap.org/user/daniel-j-h/diary/41776

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Written by karussell on 2024-09-12 at 10:58

@djh ah, yes! It's seems even better as it has the map :)

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Written by karussell on 2024-09-12 at 11:01

@djh Schade, dass man die nicht anklicken kann und auf openstreetmap.org landet...

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Written by gislars on 2024-09-12 at 12:13

@karussell

You could convert your list to CSV and import it into https://umap.openstreetmap.de and each point could have a link to osm.org

A remote link to your data should also work, so when you update your data, the map automatically updates.

Let me know if I can help with it

@djh

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Written by Christopher Beddow on 2024-09-12 at 11:48

@karussell is this similar to the checks Osmose offers? Maybe fixing with MapRoulette is a good idea

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Written by karussell on 2024-09-12 at 11:52

@cbed not sure what osmose does. I did a simple angle check, similar to what @djh did https://www.openstreetmap.org/user/daniel-j-h/diary/41777

But interestingly not only turn restriction problems are included, but also overlapping ways.

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Written by Christopher Beddow on 2024-09-12 at 12:28

@karussell @djh yeah maybe Osmose does it, not sure. But it's a good idea anyway!

You could add the geojson of the problem locations to MapRoulette and share, then people can mark each one as solved or not

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Written by Strubbl 🐧 on 2024-09-16 at 20:00

@karussell should be some issues less now. Do you plan to rerun the analysis?

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Written by karussell on 2024-09-17 at 09:14

@Strubbl Yes, will create a GeoJSON that is viewable in a map

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Written by karussell on 2024-09-17 at 10:13

@Strubbl oh, wow. A lot less, nice! Thanks :)

https://chaos.social/@karussell/113152358210974633

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Written by Strubbl 🐧 on 2024-09-17 at 11:58

@karussell Yes, the heuristic included a lot of duplicates for one issue, esp. if the overlapping way consists of more than two nodes. Then all the routing combinations between all nodes are included as separate route.

i did not look into the new geojson list yet.

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Written by Florian Lohoff on 2024-09-23 at 14:18

Why do you consider them "very likely" - These are just sharp angles on junctions. In many cases one is allowed to turn around a traffic island. And i just had a look at a random sample and they all look legit and may only be verified on site if "u-turn" is explicitly forbidden.

Just pushing this out is prone to produce a LOT of fictional turn restrictions.

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