You seem to be forgetting that buildings can't be moved and big infrastructure projects go into the billions. The USA was build with cars in mind, you can't simply undo all that and now ask people to simply get rid of their cars when everything was built specifically for cars.
The solution is not more roadways to magically reduce congestion. It's to build public transit today before it gets more expensive. See the success of the Delhi Metro in India, for example, where New Delhi was never built with a local subway system in mind. [2]
[0] https://www.citylab.com/transportation/2018/09/citylab-unive... [1] https://www.citylab.com/transportation/2018/04/why-new-york-... [2] https://www.globalmasstransit.net/archive.php?id=26471
However, as I said, I believe you (and greenonion) are oversimplifying a complex problem. If you've ever been to any US city, you will see just how much influence the car has had in the development of the entire country. From the principles that you are stating, and that I believe are empirically correct, to the implementation of any viable solution there is a gargantuan gap, and I don't see any solutions being presented. Just "cars are bad, we should use public transport".
And yes, I have been to US cities multiple times, and I don't see why the challenges there are so very different. New Delhi is denser than New York. Its traffic situation was as bad as New York. I am not saying implementation is easy. I am saying implementation is feasible. It's a matter of public and political will. What's holding it back is not that somehow the problem is so complex that it can't be solved.
Adding to the point of induced demand on traffic, thankfully it works the other way too. The traffic situation does not get significantly worse when roads are reduced. The Alaskan viaduct highway in Seattle is an example of this.
Edit: And I have seen the transformation of Vancouver to accommodate bike lanes too, and while Vancouver is nowhere as dense, my point is that the traffic situation did not actually get worse when bike lanes were introduced.
It's a way to make you look like an out-of-touch loony, who therefore gets ignored. If you want to reduce car use in the US, dial down the rhetoric, and work on increasing the convenience of not using a car. You're going to win more hearts and minds by making available something better than you are by constantly carping about the existing situation.
Walking, biking, taking the bus, carpooling are incredibly convenient for anyone willing to try, and I certainly support efforts to improve the facilities for these at all opportunities.
There are uncomfortable truths that need to be addressed about cars, however, and you don't get anywhere by avoiding it. Imagine if there were an easily preventable disease causing ~40000 deaths every year that would actually save us money to solve and help the climate situation as well. Would you ask to temper the rhetoric?
I still drive because biking is A. pretty physically grueling in a number of common weather conditions ( greater than 100 degree or less than 32 degree temps for much of the year, carrying my bike up 2-3 flights of stairs... ) B. Going to take 2-3x the time per day, before time spent showering on each end of an hour-long ride in brutal heat... Public transit is a 1+ mile walk/ride on either end of it (same problems as above), means I can only get in/out of work at specific times, and still takes 2-3x longer than driving.
That's before we get into the 2000 serious injury-causing accidents that people get in on bikes per year in my state, many of which are in my county. I really hate cars, but I'm mostly driving slow and on low-speed roads. I'm very unlikely to die or be seriously injured. That's not something I can rely on on a bike commute.
I'm looking to move closer to the office so I can mitigate some of these because I earnestly hate driving this much, but I wouldn't claim that that's going to make biking/walking "incredibly convenient", just acceptably less inconvenient.
Tempering the rhetoric in place of actually presenting facts and ideas in a non combative way that offers something of actual tangible value to people will vastly do more to accomplish the goals then trying to shame or beat down ppl.
Look, you need to say that we can prevent these deaths. You really do. But don't say it the way you did. You don't get buy-in that way.
And that's even assuming that it would be allowed on public transportation.
It would be good to hear some kind of solution, rather than just being swept under the rug. Or pushed under the bus, so to speak.
Our cities would be dramatically cheaper to live in with fewer cars. Less parking and road space allows higher density. Transit is cheaper. Walking and biking is healthier and will increase life expectancy.
Not everyone is driving-age, can afford a car or can afford to have parking. Car drivers are not a representative sample of the world population.