After decades of hyper-growth and worsening pollution, China has fully embraced rapid transit as a way to keep cities moving. By 2020, China aims to have 7,000 km (4,300 mi.) of rapid transit lines, more than five times what exists in the U.S. today.
The following animation from Peter Dovak shows this rapid transit revolution playing out by year:
By 2020, China is expected to have 220+ cities with over a million inhabitants, so as long as the government can continue to provide the resources and funding to expanding transit networks, the building boom will likely continue unabated.
image credit: Tim Riley