New proposal about traffic_sign international code mapping

I’m attach some numbers to enrich the discussion

numbers % traffic sign key
269624 5% city_limit
162308 3% maxspeed
35043 0.7% stop
20434 0.4% yes
12828 0.2% none
7095 0.1% variable_message
3193 0.06% hazard
510525 10% human_readable_values in traffic sign

numbers % highway key=value
1939202 40% highway=stop
1243900 25% highway=giveway

numbers % concept
3183102 66% human_readable with stop and giveway
1633914 33% ids

Total traffic signs in OSM (more or less)
4817016

Other keys and subkeys (counted in id codes because majority uses it):

numbers % key information
86671 1.7% traffic_sign:forward Major part id codes
66597 1.3% traffic_sign:backward Major part id codes
32557 0.6% traffic_sign:2 Major part Finnish (id codes)
11258 0.2% traffic_sign:3 Major part Finnish (id codes)
8617 0.1% traffic_sign:2:forward Major part Serbia (id codes)
7049 0.1% cycleway:right:traffic_sign Major part Germany (id codes in ways)
4799 0.09% traffic_sign:2:backward Major part Serbia (id codes)
3861 0.08% traffic_sign:4 Major part Finnish (id codes)

numbers % type
4131257 84% nodes
463820 9% ways
530 0.011% relations

multivalue ;

numbers % type
30738 0.6% nodes
19156 0.3% ways
multivalue , % type
39642 0.8% nodes
73401 1.5% ways

All these numbers are approximated (I have not count less than 1000 items in some cases) and extracted from taginfo and overpass-turbo.

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