How would we feel about it if the tunnels were for bikes? Seems like that would have some benefits: sheltered from the weather, no interaction with multi-ton vehicles driven by inattentive drivers, etc.
One could imagine a city where the streets are only for bikes/pedestrians/scooters/etc... and deliveries happen via underground tunnels where there is parking every other block and a freight elevator to bring the goods to the surface. A kind of futurist ideal that will never work because it would be horrendously expensive and the elevators would always be breaking down and as the city grew the system would be trapped at its current size and become increasingly overloaded over time.
https://www.cnn.com/travel/article/worlds-longest-cycling-tu...
It amazes me that a lot of these green cities haven't incorporated a small golf cart lanes as most people work within a range of a golf cart distance to travel.
The cost would be a lot cheaper than a car, no need for insurance premiums(if so, very little) , and less maintenance than . Also could likely double the lane traffic within the equivalent car lanes. The consumer would be more than willing to get on board using and buying golf carts just for the financial benefit of it.
Not saying that ebikes are bad but it would also be more appealing for the masses to embrace golf carts over bikes as a replacement for their vehicles.