You cannot just take all the single family home zones and subdivide them into 3, because the infrastructure needs to expand with it. If you're familiar with Ed

You cannot just take all the single family home zones and subdivide them into 3, because the infrastructure needs to expand with it. If you're familiar with Edgewater, NJ, you know what I'm talking about. There is one main road that runs through this town, and you're essentially trapped if something happens to that road. Seoul tried to address by going to outskirts of the city where land price was much cheaper and essentially built high rise clusters with parks, stores, and modern amenities. They took the, "build it and they will come" approach, with good success. Now some people in city center are kicking themselves in their undeveloped, old residential zones with tight ally. It took well over 10 years to fully build out subway systems, but you have to start somewhere (literally and figuratively).