Easy fix: If you want less of something, tax it. The race to ever bigger vehicles has many costs, from road wear to (now we know) human lives.
You pay an annual registration fee for your vehicle. Make that fee go up dramatically for heavier vehicles. If you pay, say, $100 for a car under a ton, make it $1k for up to two tons, $10k for 3 tons, etc..
You pay an annual registration fee for your vehicle. Make that fee go up dramatically for heavier vehicles. If you pay, say, $100 for a car under a ton, make it $1k for up to two tons, $10k for 3 tons, etc..