Weight is only one dimension. What matters is weight and mileage. Our family has two cars but we drive less combined than a typical single person in our area.
Where that gets problematic is you can't easily validate mileage for something like an online renewal.
I will say you did give me a fun idea however; you could in theory set up a kiosk system where scanning renewal notice + license[0] and get some sort of OBD2 plug-in device, that could record the mileage+vin+other data (to harden against faking attacks[1]) and then you take it back to the kiosk to confirm mileage.
IDK, probably not the best way to do it but maybe there's a good way to handle this sort of scenario.
[0] - In case you abscond with the dispensed device for some reason...
[1] - But this is possibly where it falls apart...
I will say you did give me a fun idea however; you could in theory set up a kiosk system where scanning renewal notice + license[0] and get some sort of OBD2 plug-in device, that could record the mileage+vin+other data (to harden against faking attacks[1]) and then you take it back to the kiosk to confirm mileage.
IDK, probably not the best way to do it but maybe there's a good way to handle this sort of scenario.
[0] - In case you abscond with the dispensed device for some reason...
[1] - But this is possibly where it falls apart...