So what's your plan to redesign every single city in the country? Are you going to build out high speed rail?

It's a dumb take because it doesn't account for the myriad of things that would need to be intrinsically altered to accomplish your goal of 30km/h cars.

I don't argue people kill tons of people with cars every year, I will argue about what your plan is outside of slow down cars. We'd be looking at least at hundreds of billions to rebuild everything, likely more.