Fig. 5: Boxplot of R2-distribution of daily travelled distance according the respective modes of transport.
From: A physiological model of human mobility: A global study

The abbreviations of the modes of transport are: d0, d1, d2, d3, as defined above, wk—walking, vo—velo or bike, bs—stage bus, cd—car driver, cp—car passenger, rt—rail, and the respective combinations.