Like most of these comparisons, this one suffers by comparing a car with average occupancy with a bus that’s full. As I’ve explained before, public transport’s usually only full at certain times and when it’s serving certain destinations; and then almost always only in one direction (see Is managing transport in cities really a no-brainer?). Still, it’s a novel and interesting way of visualising the comparison.
The road space taken by cars
There are plenty of visual comparisons around showing the amount of road space taken by cars relative to buses and trams. Haven't ever seen it put like this before, though