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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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GFEI report suggests $2T savings from fuel economy improvements in ICE vehicles through 2025 can help fund long-term transition to plug-ins

Green Car Congress

Increasingly efficient conventional combustion-engine vehicles will be key in moving towards a low carbon future, according to the GFEI. Far better fuel economy from cost-effective conventional technologies can keep fuel demand steady and save close to half the CO 2 emissions from cars by this date.

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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

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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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Global Fuel Economy Initiative Releases Roadmap Report on Achieving 50% Fuel Economy Improvement in LDV Fleet by 2050

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The IEA and ITF have developed a range of projections of possible “business-as-usual” scenarios around this, indicating the potential for a doubling (or more) of vehicle kilometers travelled (VKT) combined with modest improvements in vehicle fuel economy. Vehicle taxes and incentives. Component standards, taxes and incentives.

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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

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The National Research Council has released a prepublication edition of a new congressionally mandated report that evaluates various technologies and methods that could improve the fuel economy of medium- and heavy-duty vehicles (MHDVs), such as tractor-trailers, transit buses, and work trucks.

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CEPS task force report identifies tightening emissions standards as key policy to hit EU 60% reduction in transport GHG; full life-cycle emissions optimal metric

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The report argues that the biggest component of total transport reductions could come from more energy-efficient vehicles, combined with the gradual introduction of low-carbon fuels and new engine technologies. Eco-driving and efficient transport systems could provide for the other—much smaller shares—of reductions.

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MIT Energy Initiative report on transforming the US transportation system by 2050 to address climate challenges

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Average on-road fuel consumptions (tank to wheels) of the different propulsion systems in an average light-duty vehicle: 2010, 2030, and 2050. Values normalized to standard naturally-aspirated gasoline engine vehicle. Market-based incentives should be implemented to support the US Corporate Average Fuel Economy (CAFE) LDV requirements.

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