Speeding fines are often based on how much over the limit you are going, which is perfectly sensible given that reflects the danger and discourages petty over-e

Speeding fines are often based on how much over the limit you are going, which is perfectly sensible given that reflects the danger and discourages petty over-enforcement of very low margin speeding. Adding mass of the vehicle as a component to fines would also be a sensible measure to make the fine reflect the hazard.