
Originally Posted by
swampyankee
A current example is highway funding: a number most civil engineers will accept is that 80% of the wear and tear on the interstate highways is due to heavy truck traffic (this is overall for the US, so it smears the cost of weather damage out nationally; this is imo, appropriate for a federal program). Despite this, the federal diesel road tax (24.4¢/gallon) raises only about $14 billion/year, vs $24 billion for gasoline (virtually all heavy trucks in the US have diesel engines; very few cars do). I have not been able to find how much revenue is generated by the excise and road use tax that must be paid on heavy truck purchase and operation. These taxes don't appear to be deductible (taxes are a business expense; many business expenses are deductible).
In Denmark vehicles are in different tax brackets depending on weight, with heavier vehicles paying more, plus diesels pay more in the same bracket. I expect the latter is because diesels are expected to drive more per year (it's a flat rate weight tax paid per vehicle per year).
Recently, for private cars (not vans even if privately owned) this changed to a mileage tax, a sliding scale which basically gives tax breaks for cars with good mileage to the point were a diesel doing better than 32.1 km/L would cost about $30/year in tax (that's better that the Smart TwoFour diesel can do, so that's an easy thing for them to say
, that one will cost about $150/year with "normal" cars at $400+/year).
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