Do you count if you are just a passenger? Or at an extreme level, would you count a route travelled if you were on a bus?
Not particularly sure why being a passenger in a bus is more extreme than as a passenger in a car - its fundamentally the same thing. The other passengers?
I've got travels walking, cycling, as a passenger (inc in a bus). I would have at least a segment in 'extreme' ways such as walking backwards, running, riding in a shopping cart but I've got those segments more normal ways anyway.
There will be segments I travelled in a pushchair, asleep, but either I haven't added them as I don't know quite what they were, or I've re-travelled them.
some routes within downtown London's "congestion zone" where I couldn't drive my rental car.
I imagine because it would have been a breach of Terms and Conditions? I can see why - foreign driver doesn't pay the charge, rental company gets a fine, can't easily just charge it to the card.
I think, when I was little (about 5 or 6), I went inside that area (before it was a thing) in a car, but all my travels mapped (and I've got about 90% - just some B roads untravelled) within the Congestion Charge Zone (and most of those in the area outside it) are on-foot.