Context: i am in Europe so might be irrelevant to US.
I was thinking : we already have a usable solution to traffic jams. It’s called parking lots, as the ones in airports. You drop your car, then you take public transport to go anywhere. So imagine doing the same, but on daily basis. Build many such parking spots outside of the city , irrigate with public transport, make the price reasonable for daily usage (fuck you Charles de Gaulle Airport and your 14€/day fee). Boom, reduces your traffic by X% every morning.
As someone who drives regularly from Reims to Paris, I d be glad if such option existed, so I wouldn’t have to drive on Périphérique.
The two reasons I think it’s not used is “planning” and “politicians”. The latter isn’t good at former.
You don’t buy furniture at Ikea because you’re rich. The delivery fee is quite high for some people. Plus sometimes you want/need something the same day. And it makes sense to look at the stuff IRL as opposed to ordering from the website. IKEA is one of the things that actually make sense to drive to.