|SCorporate Average Fuel Economy (CAFE)
standards and high fuel prices resulted in large improvements in vehicle
efficiencies for almost 10 years in the late seventies and early eighties.
|SUltimately other factors such as the
interest in minivans, SUVs and heavier and higher performance automobiles
countered those improvements, and light duty vehicle efficiency actually
declined for the entire fleet. Will
|SAs we look into the future, one factor that
could change the current efficiency trend is a stronger movement towards
limiting CO2 emissions. Technology
exists to improve efficiencies, but at a cost.
|SAssuming the United States decided to incur
the cost, how quickly could changes in efficiency make an appreciable