Proposing an new speed_limit_implied=yes tag for roads with default speed limits where for some reason mapper was unable to be more specific

I’d find maxspeed:signed=no somewhat consistent with other uses, but I agree that it is fuzzy what exactly should count as unsigned. Another example other than the city limits one would be any kind of speed zone - 30-zones which might cover large areas, but also “school zones” (e.g. in United States) or, well, other signs which imply speed limits (sometimes, depending on legislation) such as cycle street signs.

Anyway, asking for clarification:

  1. Do you propose this tag to (potentially) be set on any way section where along that way section there is no (explicit) max speed sign?

E.g. there is a long road, split into three sections, in first section there is an explicit sign while in the others there isn’t because that speed limit is still valid => that tag could/would be tagged on the second and third section?

  1. If yes, do you consider that tag to be some kind of intermediate value that should be replaced by the proper value (maxspeed=…) by another mapper - like a fixme - or a tag that also signifies that there is no sign on that section (and therefore whatever applied before applies here too) and therefore would remain forever, on very many ways?
    Both definitions would come each with their own set of issues.
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