Here are some more charts showing the energy intensity of various travel modes. The data comes from
Gagnon, Luc. Comparaison des options énergétiques: Options de transport. Hydro-Quebec. 2008.
I built these charts using the data in Gagnon's paper. (Actually, he had some charts in there as well; they were really good and look a lot like these. But they were in French, plus they were in PDF format, which often gives weird results when you swipe an image for, say, a PowerPoint presentation for a class you're teaching.)
If you want to make a point on energy and transport options to an English-speaking audience, feel free to use mine.
