You know what would work just as well, but without isolating people?

Mixed zoning and mass rapid transit

Let people work walking distance to their home, give those who need to go somewhere a way of going there quicker than traffic

It'd also be good to mandate easy availability of work from home for anyone in a job where that is practical

So many people commuting to jobs that could easily be done from home nowadays

I work in the freight industry in a position I can't do from home but when the whole work from home thing was in full swing I didn't get stuck in traffic except a few times when the local drawbridge went up

This is the most infuriating part. The best solution to these issues is to remove the need to move in the first place, and WFH for the people that want it and who can do it removes a huge amount of traffic with comparably little cost (company laptop, a screen and maybe a desk and chair, many of which could just be taken from the office).