As cities become increasingly congested, current transport patterns are unsustainable: heavy in energy use, high in economic and environmental cost, and exacerbating inequity between those who can access high-speed travel and those who cannot. Good urban planning develops human-scale cities and encourages modes such as bicycles, increased zones exclusive to pedestrians within cities, and changed fiscal policies to incentivize public over private transport. Equally, it requires good engineering design to manage road use.