Comment Re:20% as much CO2 (Score 1) 78
80% less than cars is a lot less, but I'm kind of surprised it's that much. It actually makes me wonder how a Prius would fare compared to a klunky old half-full (per load factor statistics) Amtrak train.
Part of the problem is that trains are really, really heavy. A double-decker passenger train car might weigh 180,000 pounds and carry only 100 people, for a total weight of 1,800 pounds per car plus the person. So you're carrying half the weight of that Prius. The trains are still vastly more efficient because you have one powertrain accelerating all of those people in Priuses (Prii?) instead of hundreds, they accelerate and decelerate slowly (and rarely), they have low rolling resistance, etc.
Imagine how much more efficient they would be if train cars were improved with modern technology to bring the weight down.