The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule III for Model Years 2022 to 2031 Passenger Cars and Light Trucks

Please accept these 4,787 public comments, including 456 personal messages, from members and activists of the Natural Resources Defense Council (NRDC) in reference to Docket # NHTSA-2025-0491. Most individuals signed onto the following text: --- Dear DOT Secretary Duffy and Administrator Morrison, I'm writing to urge you to protect our nation's fuel economy standards — not weaken them. Today's CAFE standards save Americans money. Recently updated rules are projected to save drivers $23 billion in fuel costs and avoid burning 70 billion gallons of gasoline through 2050. Even after accounting for the cost of a new car, drivers will save an estimated $630 to $840 over the life of their vehicle. Weakening these standards would do the opposite. It would force drivers to buy cars that guzzle more gas and pay more at the pump while oil and gas companies rake in bigger profits and American families lose out. Fuel economy standards have worked for nearly 50 years. Since Congress first enacted them in 1975, they've saved more than two trillion gallons of gasoline, which is enough to power every car and light truck in the U.S. for more than 15 years. Back in the 1970s, vehicles averaged only 13 miles per gallon. Thanks to continued progress, the latest standards will raise that to about 38 miles per gallon for 2031 models — making cars nearly three times more efficient. Please stand up for American drivers and our energy security by protecting strong fuel economy standards. These standards save consumers money, reduce pollution, and lower our energy burden. Thank you. --- Thank you for considering these comments concerning the impacts of gutting the Corporate Average Fuel Economy (CAFE) standards. Sincerely, Samantha Wines NRDC National Digital Advocacy Campaign Manager

Please find attached the joint comments, and two appendices, submitted on behalf of the Center for Biological Diversity, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Natural Resources Defense Council, Public Citizen, and Sierra Club on the proposed rulemaking entitled "The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule III for Model Years 2022 to 2031 Passenger Cars and Light Trucks," 90 Fed. Reg. 56,438 (Dec. 5, 2025). We are submitting the additional attachments listed in the Index in separate docket submissions.

[Batch 1 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Introduction of Appendix A to our comment.

[Batch 2 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Background (Section II) of Appendix A to our comment.

[Batch 3 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Background (Section II) of Appendix A to our comment.

[Batch 4 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section II) of Appendix A to our comment.

[Batch 5 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section V) of Appendix A to our comment.

[Batch 6 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VI) of Appendix A to our comment.

[Batch 7 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VII) of Appendix A to our comment.

[Batch 8 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VII) of Appendix A to our comment.

Please find attached the joint comments submitted on behalf of the Center for Biological Diversity, Conservation Law Foundation, Environmental Defense Fund, Environmental Law & Policy Center, Natural Resources Defense Council, Public Citizen, and Sierra Club on the Draft Supplemental Environmental Impact Statement for the proposed rulemaking entitled "The Safer Affordable Fuel-Efficient (SAFE) Vehicles Rule III for Model Years 2022 to 2031 Passenger Cars and Light Trucks," 90 Fed. Reg. 56,438 (Dec. 5, 2025). The attachments to this comment have been submitted under a separate docket submission.

[Batch 9 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 10 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 11 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 12 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 13 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 14 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section VIII) of Appendix A to our comment.

[Batch 15 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section X) of Appendix A to our comment.

[Batch 16 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section X) of Appendix A to our comment.

[Batch 17 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section XIV) of Appendix A to our comment.

[Batch 18 of 18] Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources cited in the Legal & Technical Analysis (Section XV) of Appendix A to our comment.

Please see the attached files containing additional attachments to the joint comments submitted by Natural Resources Defense Council et al. The attachments in this submission are sources are cited in Appendix A to our comments. Some of the attachments have been split into multiple files because they exceed 10 MB in size.

Please see attached request by the Center for Biological Diversity, Environmental Defense Fund, Natural Resources Defense Council, and Sierra Club for a 45-day extension of the public comment period and additional public hearings.