[OSM-talk] Highways tagging vs Polygon

[Richard Bullock]

Am I missing something, or can we not just assume that e.g.

each highway=residential has a speed limit consistent with urban areas in 
that country - unless explicitly tagged otherwise

e.g. in the UK, highway=residential would be 30mph (48.28032km/h), unless 
tagged as something else.

each highway=trunk, primary, secondary etc. has a default speed limit 
consistent with rural areas in that country - unless tagged otherwise.

each highway=motorway has a default motorway speed consistent for that 
country.

That way, we only need to tag major through routes in cities, and rural 
roads which do not have the usual national speed limit.

The same thing applies for access restrictions. We don't need to tag that 
roads are accessible for cars - that should be assumed unless tagged 
otherwise