The way to compare that would be to calculate the accident rate per freight ton-kilometer; it's the same consideration as with figuring how "green" some transp

The way to compare that would be to calculate the accident rate per freight ton-kilometer; it's the same consideration as with figuring how "green" some transport is by looking at CO2 per ton-kilometer. cf. https://en.wikipedia.org/wiki/Units_of_transportation_measurement#Payload-distance https://en.wikipedia.org/wiki/Units_of_transportation_measur...