[Ernie Rogers]

Okay, guys,

I think you have wandered off the topic. (It was aerodynamics of a high speed car without ground effect.)

But, let me join in. Here are CO2 emissions for different transportation choices, including the new "aerocar" high speed 8-passenger "tear drop."

Shinkansen Bullet Train....................100 gm CO2 /passenger mile
U.S. Train.......................................95
Transit Bus.....................................64
Prius (two people)..........................131
Airlines.........................................3 23
X Prize car (100 mpg, 2 people)..........59

New 8 passenger rail car...................13 gm CO2e /mile

/Ernie Rogers
Some of the data are from here:
"High Speed Rail and Greenhouse Gas Emissions in the U.S."
Center for Clean Air Policy and Center for Neighborhood Technology