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Study finds that increased vehicle travel and decreased occupancy have undercut the impact of improving fuel economy over last 40 years

Green Car Congress

Sivak found that while the vehicle fuel economy of the entire light-duty fleet improved by 40% (from 13 mpg US to 21.6 l/100km), because of the decrease in vehicle load, the occupant fuel economy only improved by 17% (from 24.8 Combining these two effects yields a reduction of about 14% in the amount of fuel used.

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National Research Council Report Explores Improving Fuel Economy of Medium- and Heavy-Duty Vehicles; Recommends Immediately Beginning Developing a Regulatory Approach

Green Car Congress

Comparison of 2015-2020 new vehicle potential fuel-saving technologies for seven vehicle types: tractor trailer (TT), Class 3-6 box (box), Class 3-6 bucket (bucket), Class 8 refuse (refuse), transit bus (bus), motor coach (coach), and Class 2b pickups and vans (2b). Source: TIAX. Click to enlarge. per gallon. per gallon or higher.

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IEA technology and policy reports outline paths to halving fuel used for combustion-engined road transport in less than 40 years

Green Car Congress

IEA fuel economy readiness index status, 2010. New propulsion systems requiring new fuels, such as plug-in electric vehicle systems and fuel cell systems, are beyond the scope of this technology roadmap and are treated in separate roadmaps. Average fuel economy and new vehicles registrations, 2005 and 2008.

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Belfer Center Study Concludes Reducing Car and Truck GHG Emissions Will Require Substantially Higher Fuel Prices; Income Tax Credits for Advanced Alt Fuel Vehicles Are Essentially Ineffective at Reducing Sector Emissions

Green Car Congress

The economy-wide CO 2 prices applied increase the cost of driving only marginally with respect to the business-as-usual case. Direct transportation (fuel) taxes generate the greatest reductions in CO 2 emission from transportation, achieving CO 2 emissions at 86% of 2005 levels by about 2025.

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Study Finds That Implementation of a Portfolio of Transportation Strategies Will Be Required for Significant Reductions in GHG from Transportation Sector; Pricing Strategies Have the Largest Potential

Green Car Congress

Strong economy-wide pricing measures (such as a $5.00 per gallon fuel tax by 2050) could result in an additional reduction of 28% in GHG emissions. The Moving Cooler baseline extrapolated these projections further to 2050, resulting in a potential doubling or greater of fleet fuel efficiency. Land use and smart growth.