President Donald Trump signed an executive order on Monday that marks the most sweeping federal shift in diesel tax enforcement in decades, temporarily permitting red-dyed diesel — long restricted to farm equipment and off-road industrial machinery — to flow through the tanks of commercial trucks and highway vehicles. The White House framed the measure as emergency cost relief for truckers and freight operators hammered by diesel prices averaging $6.32 per gallon as of this week, a near-record level the administration attributes to wartime disruptions squeezing global refinery output from two simultaneous fronts.
