The best transportation is public transportation and bicycle that Scandinavian countries promote. With China's huge population density it is very effective.
After decades of restricted freedom, Chinese are liberated with cars for the freedom. Gas is priced low by the government.
is enhancing its subway system that has already made India looking like
they're in the stone age. She has about 60% of high speed rail of the
world from a country that could not build a reliable bicycle in the 50s.
Chinese is #1 or #2 in most renewable energies.