America.gov has just published a multimedia set on the future of cars and transportation.

http://www.america.gov/econ/business.html

Two articles have interesting insights from Rob Farrington of NREL and John Heywood of MIT.

Among their observations:

--The most promising solution to our dependence on imported oil and the climate change challenge is to get people to use transportation other than individual vehicles
--To maximize fuel savings and emission reductions in the shortest period, the focus should be on improving conventional gasoline-fueled internal-combustion vehicles and discouraging individual driving, experts say.
--Goals of increasing energy security and decreasing global warming are not always compatible
--Technology does not provide straightforward solutions to transportation problems