Logistics provider ArcBest has completed a three-week pilot of Tesla’s battery-electric Semi, logging 4,494 miles on freight routes between Reno, Sacramento and other Northern California locations. The Class-8 tractor consumed 1.55 kilowatt-hours of electricity per mile, translating into an average 321 miles of revenue service per day and handling a 7,200-foot climb without incident, according to data released by ArcBest’s ABF Freight unit. The result represents roughly a 10% improvement over the 1.6 kWh-per-mile efficiency Tesla reported for its company-operated fleet in September 2024 and narrows the gap with diesel on a cost-per-mile basis. It also betters the 1.7 kWh-per-mile figure cited by Chief Executive Officer Elon Musk when the production-intent version of the truck was unveiled in 2022. Tesla plans to begin volume manufacturing of the Semi at a new Nevada plant late this year, with broader customer deliveries slated for 2026. ArcBest said the trial demonstrates that battery-electric tractors can meet the duty-cycle demands of regional freight while advancing carriers’ decarbonization targets.