well I STILL haven't seen any Kamm-back flaps or under-trailer skirting on a semi-trailer.
I don't get out very much, though.
anyway here's a print version of some of the points made in the CNBC video of Wal-Mart's truck fleet's efficiency improvements of all kinds:
(and the fellow's name is spelled Chris Sultemeier)
Green Car Congress: Wal-Mart Estimates 50% of Fleet Efficiency Gain by 2015 Could Come from Vehicle Technology, 50% from Operational Improvement
btw I think that Congress should give "bondo" the poster above, $785 Billion worth of Bondo. and "carte blanche" to apply it as he sees fit. That would end our dependence on foreign oil right then and there. I'm only half kidding. and give aerohead $785 Billion for AluPo and carbon-fiber