Review of Light-duty Vehicle Fuel Economy and Emissions Standards

The document examines the impact of the 2012 EPA and NHTSA fuel economy and emissions standards for light-duty vehicles (2017–2025). It highlights a market shift toward sport utility vehicles (SUVs), which use approximately 14 percent more fuel than similarly sized cars. The author argues that the current 'footprint-based' standards are effective because they set targets based on vehicle size, encouraging efficiency across all vehicle types rather than just a few models. While these standards are projected to reduce emissions by over 600 million metric tons by 2040, the document suggests that updating them to reflect recent technological advances is necessary to meet original projections due to the rising popularity of larger vehicles.

• Consumer preferences have shifted toward sport utility vehicles (SUVs), with their market share rising from 29 percent to 39 percent, while passenger cars dropped from 55 percent to below 45 percent.
• The current regulatory framework uses footprint-based standards that adjust targets by vehicle size, which prevents a manufacturer's compliance from being solely dependent on sales volume and encourages efficiency across all vehicle types.
• Existing standards are projected to reduce emissions by more than 600 million metric tons in 2040, despite the increase in SUV sales, though they may not be sufficient to reach initial projections without further updates.
• Technological innovation has allowed manufacturers to exceed current standards, with over 10 percent of vehicles sold in the previous year already meeting the 2020–2025 standards.

APA

Union of Concerned Scientists (2016). Review of Light-duty Vehicle Fuel Economy and Emissions Standards. https://www.ucs.org/sites/default/files/attach/2016/06/Fuel-Economy-Standards-SUVs.pdf

Chicago

Union of Concerned Scientists. Review of Light-duty Vehicle Fuel Economy and Emissions Standards. 2016. https://www.ucs.org/sites/default/files/attach/2016/06/Fuel-Economy-Standards-SUVs.pdf.

Wikipedia

{{cite report |author=Union of Concerned Scientists |title=Review of Light-duty Vehicle Fuel Economy and Emissions Standards |date=June 2016 |url=https://www.ucs.org/sites/default/files/attach/2016/06/Fuel-Economy-Standards-SUVs.pdf |access-date=23 October 2026 |via=Climate Insights Directory}}

BibTeX

@techreport{unionofconcernedscientists2016review, author = {{Union of Concerned Scientists}}, title = {{Review of Light-duty Vehicle Fuel Economy and Emissions Standards}}, institution = {Union of Concerned Scientists}, year = {2016}, month = jun, url = {https://www.ucs.org/sites/default/files/attach/2016/06/Fuel-Economy-Standards-SUVs.pdf}, urldate = {2026-10-23}, note = {Indexed by Climate Insights Directory} }