This is not out in some rural town. This is in Portland, OR about 2 miles from downtown. Personal vehicles this large are simply incompatible with urban living and pressure their owners to continually break traffic law. Technically that Miata is parked as close to the stop sign as it can legally be, but as the Denali doesn’t fit in many places around here it’s owner is compelled to park across both the stop sign and the crosswalk.
Well, yeah, if the car makers can add exceptions to the law and turn it upside down then the law becomes useless.
I explicitly wouldn’t allow that exception. If larger cars are less efficient then disincentivizing their use by means of higher taxes is clearly beneficial to society. If you want to drive that three-ton gas guzzler then you can surely afford that 30% higher vehicle tax. If you can’t, might I interest you in this comparatively efficient and tax-reduced Subaru Sambar?
Mind you, I would apply different rules to things like semi trucks that (at least in my part of the world) you can’t drive without a special license. But if you can drive it with a regular European class B license then the tax should scale progressively with size and mass because making larger and less efficient cars unattractive is specifically the point.