@chris Yeah, I'm pretty sure that if your city is car-dependent then people who cannot drive for health reasons are pretty much locked at home. At least it's what I've seen with family and friends when they would break a limb.

IIRC in France bike lanes are the appropriate path for vehicles like e-wheelchairs and mobility scooters, after all it's at similar speeds and with quite similar safety concerns.
And I think you need even better than just walkability for manual wheelchairs, after all just few stairsteps can be a complete obstacle for some.