That will just make the gigantic SUVs with 7 or more seats dominate even more.

car weight / min(number of seats, number of people in the family)

This metric disincentivizes carpooling -- everyone should drive a light single-seater to minimize their tax.

(I agree with the spirit, just calling out that there are going to be edge cases galore with a scenario like this)

	▲	paulryanrogers 3 days ago \| parent [-]
		Do people car pool anymore?