Dodo, my boss once told me the statistics about the spanish AVE.. I have no way to corroborate it (he assure me that it had taken into account the origin of the spanish pool energy).

An one person average diesel car prodcued roughly three times more thant a 60-80% filled Ave per person.

So basically, if you can fill the car up to 4 it is  better to take the car.. if you do not .. the fast train.

A  60-80% long-dsitance bus is far more efficient with the present pool of energy.

that's what he said.. no way to check... only autoritas, no data.

A pleasure

I therefore claim to show, not how men think in myths, but how myths operate in men's minds without their being aware of the fact. Levi-Strauss, Claude