Good planning laws should require the developers pay for some of the transport and government services used by the new residents. The UK's section 106 does this

Good planning laws should require the developers pay for some of the transport and government services used by the new residents. The UK's section 106 does this, I've seen it build or improve roundabouts, junctions, roads, GPs offices (PCP offices), train stations, bus stations, schools, community centres, water and sewage links. Or the plan by South Korea to build a city where cars aren't needed.