President Trump’s recent decision to rescind the Biden-era fuel efficiency standards marks a sharp shift in U.S. transportation policy. While the administration frames the move as a win for consumers and automakers, the implications extend well beyond the showroom floor. The rollback raises fresh questions about how automakers should plan long-term investments in an increasingly fragmented regulatory environment. What The Biden Standards Were Designed To Achieve The Biden administration’s rules, finalized in 2024, set aggressive targets:…