I'd be happier with paved bike trails everywhere nearly as wide as single lane roads, that also crossed other car roads either under or over ( where practical) so you wouldn't have to stop and to lessen dangers of accidents between cars and riders. I do eventually envision numerous city downtown areas blocked off to cars and only allowing pedestrians and bikes. It could result in more freed up green space and removal of ungainly parking garages that tower as high as skylines, while making those same areas more peaceful and safe. Cars are 4000 to 6000 lb hunks of metal that are costly to move around people that weigh less than 250 lbs. (Most of the time). The energy involved in making them, and resources consumed are mind boggling. Compared to the maybe 60lb ebike that can move those same humans around, give them some exercise so they can stay in shape, live longer, be healthier while doing it, and lowering health care costs, seems to be a no brainer.
Cities in the Netherlands really rejected this whole car centric Urban planning starting back in the 1970's. The Dutch use bikes as a tool to feed into the public transit systems. 50% of all trips on public transit begin with a bike. That first and last mile role is huge for bikes.
It will be much harder for the US to undo the mess we have created with cars, pavement, and parking. And many roads and bridges are in disrepair because states no longer can afford to keep them up. So many states like my own have budget deficits so deep, they can't even fund their pensions properly let alone the roads.
I suspect re-doing this insanity will take years of painful recognition. Ebikes are the pathway in my humble opinion. They can be the catalyst to overcome the mental obstacles society has about use of bikes for more than just infrequent joy rides. It'll take very stubborn people (such as yours truly) to push this direction.
