Tag Archives: auto

Why is passenger rail so damned inefficient?

[ This is about passenger rail, not freight rail, which is incredibly efficient. Freight rail is efficient because to reduce aerodynamic drag and diesel fuel use (USDOT 2008), they travel on average  only 23 miles per hour (to reduce aerodynamic … Continue reading

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What is most energy efficient mass transit mode: bus, rail, or auto?

Before I get started on which of these transportation modes is better, consider how much lightweighting buses, locomotives, (and trucks) would save on energy.  I can’t find similar figures for trucks and locomotives, but the next 2 slides about autos … Continue reading

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How much energy does it take to make a car? by David Fridley, LBL

David Fridley. August 25, 2009.  Embodied and operational energy of vehicles.  I read an article today by Xiaoyu Yan titled Energy demand and greenhouse gas emissions during the production of a passenger car in China in journal Energy Conversion and … Continue reading

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Electric vehicle overview

[ Most, but not all of what follows comes from the NPC paper below. I’ve reworded or interjected some comments as well. As you can see in Figure 1 below, light cars and trucks are the main guzzlers of petroleum.  … Continue reading

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