With the imminent inauguration of elected President Donald Trump and no response from the Biden administration, California decided to temporarily suspend the advancement of the regulation.
California has made a significant shift in its effort to impose stricter environmental regulations in the transportation sector. On January 14, the California Air Resources Board (CARB) withdrew its exemption request to the United States Environmental Protection Agency (EPA) for the enforcement of the Advanced Clean Fleets regulation. This legislation, which came into effect last year, requires freight transport companies and large fleets to replace diesel trucks with zero-emission trucks. However, CARB could not enforce the regulation without a federal exemption.
This move comes amid political uncertainty. With the imminent inauguration of Donald Trump and no response from the Biden administration, California decided to temporarily suspend the advancement of the regulation. The new president has promised to reverse environmental regulations implemented during Joe Biden’s presidency, putting the future of initiatives like Advanced Clean Fleets at risk.
Although California had previously obtained an exemption for passenger vehicle (Advanced Clean Cars II) and heavy-duty truck (Heavy-Duty Omnibus) regulations, the EPA did not resolve other pending requests, including the exemption for Advanced Clean Fleets. Reports indicate that the EPA cited a lack of time to process these requests before the administration change.

Reactions from the transportation sector
The withdrawal of the exemption request was met positively by various transportation sector organizations. Todd Spencer, president of the Owner-Operator Independent Drivers Association (OOIDA), celebrated the move, highlighting the need for more reasonable policies that would allow small transportation businesses to remain viable. Meanwhile, the California Trucking Association expressed optimism about addressing emissions in a more technological and cost-effective manner, reiterating its position that the regulations were unattainable.
The Western States Trucking Association also applauded the withdrawal, pointing out that, during a crisis caused by wildfires in California, imposing such strict regulations would only exacerbate the issues with the infrastructure for electric truck charging.
Lastly, the Specialty Equipment Market Association (SEMA) also supported CARB’s decision and called for an end to coercive measures. According to SEMA, the implementation of Advanced Clean Fleets would have had a negative impact on interstate trade and the economy in general.

The future of Advanced Clean Fleets
The withdrawal of the exemption request casts doubt on the future of the Advanced Clean Fleets regulation. While the regulation will not be enforced immediately, fleets will need to continue monitoring ongoing federal legal actions and future federal government decisions. For now, transportation companies in California can breathe a bit easier, but uncertainty remains in an industry facing an increasingly complex regulatory landscape.

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