I live in Houston, TX and I drive 23 miles to work and see that something like half the vehicles are either pick-ups or suv's with one person in it commuting to there office job. If the SUV has 7 people in it then 20MPG*7people is pretty good compared to 7 cars at 50MPG, but most people wont car pool with there SUVs and that is why they are not commuter vehicles.
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