Fig. 8: Time-distance-energy-space.
From: A physiological model of human mobility: A global study
Power of distance and time over speed of selected modes of transport in linear a and double logarithmic b representation. The figure is actually a 3-dimensional plot in horizontal (Pm(t)—bottom) and vertical (Pm(l)—top) projection over travel speed, showing modal human behaviour in a time–distance–energy–space.
