[OSM-talk] zones for motorway/in town/outof town?

[MP]

>  > Well, we can have layering (layer=-5 ... 5) like for any other tags,
>  > so we could have small zone with different limits within one large
>  > zone. For clashes with "default" rules from place=... and alike, we
>  > can define some rules of precedence (speed limits on individual ways
>  > have highest priority, followed by rules from speed limit zones, rules
>  > from place=..., then default country rules). And if zones with same
>  > priority overlap? Then it is bad mapping (as are typos like
>  > highway=residental or other bugs) and someone needs to fix it in the
>  > database.
>
> And what about using 'multipolygon' relation?

That is another possibility, though for nested zones you'll need two
ways - one as inner side of the multipolygon and one as the nested
zone. Though if inside the nested zone are default rules, or the
bondary is not completely shared, using multipolygon could be better.

Martin