Trump administration temporarily relaxes truck hours of service rules for gasoline and diesel shipments, according to the US Department of Transportation

The mechanism is logistics, not production: the constraint being eased is tanker-truck driver availability and delivery frequency into local terminals, so the read is that the bottleneck sits in distribution rather than in crude or refining capacity. Past episodes of this kind have tended to precede or accompany other emergency measures, such as fuel specification waivers or strategic stock releases, and the waiver itself is usually a tell that regional rack prices or retail outages were already flashing tightness. The distinction worth drawing is between a nationwide waiver and a regional one: regional waivers point to a localized dislocation that crack spreads and basis differentials absorb, while broader waivers signal system-wide stress. What follows in comparable sequences is monitoring of the underlying cause, the duration and any extension of the waiver, and whether wholesale-to-retail spreads normalize. As a regulatory action it confirms a problem exists; it does not itself add supply.