Nutzer überschreibt maxspeed-Angaben durch z.B. maxspeed=DE:zone30

Das ist dokumentiert:

“Currently, there are local communities using the key source:maxspeed=* for this purpose.”

Quelle: https://wiki.openstreetmap.org/wiki/Key:maxspeed#Values

Sowie:

“These tags can be used in the tag source:maxspeed=* as well, in addition to an explicit maxspeed=* value - which is currently preferred by some local communities.”

Quelle: https://wiki.openstreetmap.org/wiki/Key:maxspeed#Implicit_maxspeed_values

Und betreffend 30/20iger Zonen:

“This tagging is overlapping with the dedicated tag zone:maxspeed=* which is superfluous when specified in the maxspeed-tag itself.”

Quelle: https://wiki.openstreetmap.org/wiki/Key:maxspeed#Maxspeed_zones