Maxspeed and Road Tagging

Analysis on the tagging of maxspeed on roads, highlighting the ease of adding roads, challenges faced without signage, and implications of legislative changes on mapping unsigned speed limits. The visual content depicts the process and intricacies involved in mapping road speed limits.

• Maxspeed
• Roads
• Tagging
• Mapping
• Legislation

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Uploaded on Mar 01, 2025 | 0 Views

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Presentation Transcript

1. maxspeed

2. What percentage of roads have maxspeed tagged?

3. What percentage of roads have maxspeed tagged? 15 %

4. Just a matter of time..

5. Just a matter of time?

6. Nope.

7. But why?

8. But why? 1. Adding roads is easier vs Images Sources: https://wiki.openstreetmap.org/wiki/File:Bajrabarahi_Nepal_mapping_training.jp g https://wiki.openstreetmap.org/wiki/File:Surveying_with_walking_papers.jpg

9. But why? 1. Adding roads is easier 2. No sign, what to tag? Images Source: https://commons.wikimedia.org/wiki/File:Portsmouth_Road,_Long_Ditton_- _geograph.org.uk_-_2148542.jpg

10. No sign, what to tag?

11. maxspeed=90

12. maxspeed=90 80 When the legislation changed but you mapped all unsigned speed limits with maxspeed

13. maxspeed=80 source:maxspeed=FR:rural

14. maxspeed=80 source:maxspeed=FR:rural 1:1 maxspeed=80

15. (maxspeed=80) source:maxspeed=FR:rural 1:1 maxspeed=80

16. maxspeed=80 source:maxspeed maxspeed:type

17. maxspeed=80 source:maxspeed maxspeed:type zone:maxspeed

18. maxspeed=80 source:maxspeed maxspeed:type zone:maxspeed zone:traffic

19. maxspeed=FR:rural source:maxspeed maxspeed:type zone:maxspeed zone:traffic

20. maxspeed source:maxspeed =FR:rural maxspeed:type zone:maxspeed zone:traffic

21. Sounds good, doesnt work

22. Sounds good, doesnt work Mappers still need to know in which road category they are to make any contribution at all

23. Sounds good, doesnt work Mappers still need to know in which road category they are to make any contribution at all Those road categories need to be defined comprehensively and mappers need to know about them (for each country) But they aren t (it s not always just urban/rural)

24. Default Speed Limits wiki.osm.org/wiki/Default_speed_limits

25. Findings

26. Findings source:maxspeed (etc.) schema is only good to determine if it is signed, urban or rural (But: it is only set if no explicit maxspeed is specified )

27. Findings source:maxspeed (etc.) schema is only good to determine if it is signed, urban or rural (But: it is only set if no explicit maxspeed is specified ) Many road types can be determined from physical properties or their classification in OSM with certainty. A plethora of more tags are used in different countries

28. Demo!! westnordost.github.io/osm-legal-default-speeds/

29. Thank You! Made possible through grant from