Fig. 3: Spatial patterns of inter-city flows of different travel modes.
From: Evolution of inter-city transportation modes in China from cars to alternatives
a Direction distribution of road, rail, and air travel in 2019. b Modal share changes in different directions of road, rail, and air travel from 2015 to 2019. c Distance-dependent changes in the volume of road, rail, and air travel from 2015 to 2019.
