I love this thread, useful insights and lots of quotable stuff. I like the insight that if you see a lot of pedestrians or cyclists, it's probably a good place of cyclists. Also because the drivers will be expecting bikes on the road and be used to them, so more awareness, higher safety and less being-honked-at just for being on the road, unlike in other places.
What downtown, suburbs etc. means in terms of (walk|bike)ability can differ a lot by location/region/country IMO. What I'd do (in fact doing it right now) is examine my (expected) errands for frequency, to make a list based on what I actually (want to) do, taking into account some contingencies for times when I might be less fit/ill. I'll share my list:
- daily: bakery, park - contingency: pharmacy
- 1-2 times a week: non-Costco* groceries/consumables (e.g. ethnic grocer, in case of bad (meal) planning or very perishable food), ability to post letters** - contingency: General Practitioner
- (bi-)weekly: Costco run, post office
- monthly: hardware store, bicycle repair/electronics/clothes shops, staples/consumables with a long shelf life, other medical specialists
- (hopefully) less frequent: attorney/notary/others.
Then you know how often you would have to go where, and can look at how long to ride/walk somewhere is acceptable to you how frequently, taking account the specifics of the places to go, whether it would be mostly planned/unexpected, etc., so your list could look like this for a person like me:
- 5 mins walk/2 mins bike ride: bakery, pharmacy
- 15/5 mins: park, ethnic grocer, convenience store, GP
- 40/15 mins bike ride: post office, Costco (slower when hauling the trailer)
- no walking/25 mins bike ride: hardware store, bicycle repair/electronics/clothes shops, non-Costco-staples/consumables with a long shelf life, other medical specialists
- up to 40 mins of biking (public transit starting to become a good default here): attorney/notary/others
To get from mins to distance, I calculate 5kph (3mph) for walking, and 15kph (10mph) for biking (both at a leisurely pace), so the categories' distances would be: 5/2: 0.4km (1/4mi), 15/5: 1.25km (0.6mi), 40/15: 3.2km (2mi), -/25: 6.25km (4mi), -/40: 10km (6.2mi).
I would then use this personal list to examine potential living locations on their bikeability according to my own criteria.
*) In my post, replace "Costco" by the Aldi/Lidl or other bulk/discount groceries store of your preference (I also include fresh food here)
**) Outside the US, many postal services don't pick up mail from your house. Instead, there are mailboxes distributed around town. You want to live near one (or a post office). The internet will of course make this less relevant as years pass.