  The development of public transportation networks and associated transit
oriented development policies are efficient tools to mitigate urban sprawl and
its negative environmental impacts, especially in terms of commuting emissions.
We study in this paper the trajectories in terms of sprawl and public transport
accessibility of the nine largest Chinese megacities, from 2000 to 2030 with
projected transportation networks and populations. Using the radial profile
methodology, we compare the evolution of population distribution with the
evolution of accessibility profiles. We show a rebalancing of access in time,
suggesting the efficiency of transport network growth regarding
transit-oriented development objectives.
