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Thank you! Not the stat I remember, but sounds like it is in line. As others have pointed out, the ROW includes sidewalks, and the planting strip used to protect sidewalks from vehicles. If I add to this all the off-street parking, then 33% sounds pretty darned plausible / in-line with this stat. Aside, Jennifer Wieland is one of the most awesome public servants I've ever met.

ROWs usually extend far beyond the edge of the road.

You'd be surprised how far into your yard the ROW for your street extends.

My neighborhood has possibly one of the more generous plantable right-of-ways in the city; the sum of plantable ROW is wider than the paved surface. But most places it seems to be 4-6 feet plantable, and denser areas completely paved.

I would assume that includes sidewalks?

Yes. Paved doesn't necessarily mean that it's vehicle-accessible.

Does 'public right-of-way' include green parks? Spaces such as sculpture park, volunteer park, botanical garden, discovery park, and many more?

No, those aren't considered part of the ROW by any accounting I'm familiar with.