Automobile fuel economy derived from tests varies greatly from that obtained from actual daily use. This 'gap' appears to be growing because tests do not reflect real-world driving and because driving is increasingly becoming less fuel-efficient. Comparisons among the US, Canada and four...

Passenger transportation in Japan, which is comprised of a high share of rail passengers and a low share of private vehicles, is considered one of the least energy-intensive transportation sectors in the industrialized countries. The thesis of this paper is that, despite low per capita energy...

Car use and fuel economy are factors that determine oil demand and carbon dioxide (CO2) emissions. Recent data on automobile utilization and fuel economy reveal surprising trends that point to changes in oil demand and CO2 emissions. New vehicle and on-road fleet fuel economy have risen in...