Btw by definition, speed = distance / time. I first learned about half a year ago the concept of adding work time to driving time in "Ivan's Car": https://www.

Btw by definition, speed = distance / time. I first learned about half a year ago the concept of adding work time to driving time in "Ivan's Car": https://www.deautovanivan.nl/eng.html https://www.deautovanivan.nl/eng.html > How fast is your car? > The effective speed is calculated on the basis of the price of the car (costs per kilometer) and income (net income). The amount of hours you have to work to drive your car (taxes, insurance, fuel, etcetera) is added to the average speed of a car driver in the Netherlands.