Hi Paul,
Thank you for the note about speed bumps.
The question at hand for me is to be able to list specific strengths, weaknesses, opportunities in using either city/authoritative data or volunteered/osm data. I find the territory fuzzy.
For instance, is the osm data added by trimet employees authoritative or volunteered?
Is volunteered data about Portland Streets classified as "living streets" wishful thinking, or valuable/precedent/influencing labels.
Add to the list, OSM layers and bridge gotchas, sidewalks coverage, crossings, speed notes and whatever information that may/may not add useful and correct information to mapping, routing, and analyzing stories about where people walk.
more later, (after my walk!)
best,
Katie