This could be solved much like how automobile 'miles per gallon' figures are given, there is the 'urban' cycle for city driving and the figures for 'highway' dr

This could be solved much like how automobile 'miles per gallon' figures are given, there is the 'urban' cycle for city driving and the figures for 'highway' driving and then there is the 'combined cycle'. Everyone knows that in a month of Sundays you aren't going to get anything near that '54 mpg combined' figure shown on the sticker for that Prius but you will get more miles per gallon in that car rather than that GM dinosaur advertising '14 mpg combined'.