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Evaluation of California Greenhouse Gas Standards and Federal Energy Independence and Security Act – Part 1:Impacts on New Vehicle Fuel Economy
ISSN: 0148-7191, e-ISSN: 2688-3627
Published May 12, 2008 by SAE International in United States
Annotation ability available
Event: Government/Industry Meeting
Carbon dioxide (CO2) is the primary greenhouse gas emitted by gasoline-powered motor vehicles, and the amount of CO2 emitted depends directly on the amount of gasoline burned by the vehicle. Any reduction in vehicle fuel consumption will also reduce CO2 emissions, and any reduction in CO2 emissions requires a reduction in fuel consumption.
In 2004, pursuant to Assembly Bill (AB) 1493, the California Air Resources Board (CARB) adopted greenhouse gas emission standards for new vehicles that would require substantial reductions in CO2 emissions and fuel consumption from light-duty motor vehicles. In December 2007, Congress made significant amendments to the Corporate Average Fuel Economy (CAFE) program with the passage of the Energy Independence and Security Act of 2007 (EISA2007). After the President signed EISA2007 into law, U.S. EPA announced its decision to deny an application for a waiver of federal Clean Air Act preemption that CARB was seeking in order to enforce its AB 1493 regulations. CARB has challenged U.S. EPA's decision to deny the waiver, claiming that the AB 1493 regulations and a second phase of standards that are not yet adopted would achieve the following:
- 1Yield a new vehicle fleet with higher fuel economy ratings than will occur under the CAFE regulations, and
- 2Yield greater GHG emission reductions than will occur under the federal program.
This paper-which is the first of a two-part series- addresses the issue of whether the California rules do, in fact, yield a new vehicle fleet with higher fuel economy ratings than under the CAFE regulations. The second paper1 addresses the issue of whether the California rules yield greater fuel consumption and GHG emission reductions.
A comparative analysis of the AB 1493 regulations and the federal CAFE standards required under EISA2007 indicates that the federal CAFE standards require greater reductions in fuel consumption. CARB's conclusion that the AB 1493 standards are superior to those under the CAFE program rests on the assumption that a second round of AB 1493 standards (referred to as Pavley 2) will ultimately be adopted in California, even though CARB has not yet started the process required under State law to adopt new standards. Further, CARB has not even attempted to demonstrate that compliance with the Pavley 2 standards is either technically feasible or cost effective. Absent CARB's assumption that compliance with the hypothetical Pavley 2 standards is both feasible and cost effective, the federal CAFE program will result in greater improvements in new vehicle fuel economy than the California standards.
CitationLyons, J., Carlson, T., and Austin, T., "Evaluation of California Greenhouse Gas Standards and Federal Energy Independence and Security Act – Part 1:Impacts on New Vehicle Fuel Economy," SAE Technical Paper 2008-01-1852, 2008, https://doi.org/10.4271/2008-01-1852.
- Darlington, T.L. Kahlbaum, D. “Evaluation of California Greenhouse Gas Standards and Federal Energy Independence and Security Act - Part 2: CO2 and GHG Impacts,” Society of Automotive Engineers Technical Paper Series 2008-01-1853 2008
- Federal Register 73 45 12156 March 6 2008
- California Air Resources Board “Comparison of Greenhouse Gas Reductions for the United States and Canada under U.S. CAFE Standards and California Air Resources Board Greenhouse Gas Regulations,” February 25 2008
- Federal Register 68 66 April 7 2003
- Federal Register 71 66 April 6 2006
- California Health and Safety Code
- California Air Resources Board “Proposed Expanded List of AB32 Early Actions,” October 25 2007 ftp://ftp.arb.ca.gov/carbis/board/books/2007/102507/07-10-2pres2.pdf
- California Air Resources Board “Addendum Presenting and Describing Revisions to: Initial Statement of Reasons for Proposed Rulemaking to Control Greenhouse Gas Emissions from Motor Vehicles,” September 10 2004
- U.S. EPA “Light-Duty Automotive Technology and Fuel Economy Trends, 1975 through 2007: Appendix B, Model-Year 2007 Nameplate Fuel Economy Listings,” September 2007
- Austin, T.C. et al “Basic Analysis of the Cost and Long-Term Impact of the Energy Independence and Security Act Fuel Economy Standards,” Sierra Research Report April 24 2008
- California Air Resources Board “Initial Statement of Reasons for Proposed Rulemaking to Control Greenhouse Gas Emissions from Motor Vehicles,” August 6 2004
- Austin, T.C. et. al “Review of the August 2004 Proposed CARB Regulations to Control Greenhouse Gas Emissions from Motor Vehicles: Cost Effectiveness for the Vehicle Owner or Operator,” Sierra Research Report No. SR2004-09-04 September 2004
- U.S. EPA “Light-Duty Automotive Technology and Fuel Economy Trends” 1975 through 2007,” September 2007
- Automotive News “2008 Market Data,” February 25 2008
- Notice of Proposed Rulemaking, Average Fuel Economy Standards, Passenger Cars and Light-Trucks April 22 2008 http://www.nhtsa.gov/portal/site/nhtsa/menuitem.43ac99aefa80569eea57529cdba046a0/