The freight market entering June 2026 is being shaped by forces that have nothing to do with load boards and everything to do with courtrooms, factory floors, and fuel terminals. The ISM Manufacturing PMI hit 54.0 in May — its highest reading since May 2022 and the clearest signal yet that industrial demand is pulling freight volumes upward. Diesel dropped to $5.35 per gallon as of June 1, offering the first real relief to owner-operator margins in months. And the Department of Justice is now fighting to block a $166 billion tariff refund order that could reshape cross-border freight economics for the rest of the year. For dispatchers and carriers trying to price loads and plan capacity, these three macro forces are now as important as the DAT rate screen.
- Manufacturing expansion is accelerating, boosting industrial freight volumes and supporting sustained rate strength on industrial corridors.
- Diesel prices eased, giving carriers temporary margin relief while surcharges lag and hurricane season could reverse the drop.
- DOJ appeal of the tariff refund order injects legal uncertainty that could lock up importer funds and shift cross-border and port freight.
- Capacity is tightening, with high tender rejections, rising spot and flatbed rates, and slower fleet returns pressuring contract pricing.
Manufacturing Is Expanding — and It Is Pulling Freight With It
The ISM Manufacturing PMI registered 54.0 percent in May 2026, up 1.3 percentage points from April and its highest level since May 2022. After spending most of 2023 and 2024 in contraction territory below 50, the manufacturing sector has now posted consecutive months of expansion, and the acceleration is showing up directly in freight demand.
The New Orders Index expanded for the fifth consecutive month, registering 56.8 percent — a reading that signals the manufacturing pipeline is filling, not just clearing backlog. Four of the six largest manufacturing industries reported increased new orders: Computer and Electronic Products, Chemical Products, Transportation Equipment, and Machinery. Each of those sectors generates significant Class 8 freight volume, particularly on flatbed and specialized trailer equipment.
The ISM reading corresponds to a 2.2 percent increase in real GDP on an annualized basis, according to ISM’s own calculation. For the freight market, that translates to a meaningful tailwind: more goods being manufactured means more loads to move, particularly on industrial-heavy lanes in the Midwest, Southeast, and Texas Triangle corridors. The FTR Transportation Market Update for June 1 confirmed that total spot loads in 2026 have been running dramatically above 2025 and 2024 levels through the first 21 weeks of the year, and the ISM data suggests that trajectory is accelerating rather than plateauing.
Diesel Drops to $5.35 — But the Relief Is Relative
The DOE national average for on-highway diesel came in at $5.35 per gallon for the week of June 1, 2026, a notable drop from the $5.60-plus levels that had been pressuring margins through most of May. For owner-operators running 120,000 miles per year at 6.5 MPG, that $0.25-per-gallon decline translates to roughly $4,600 in annual fuel savings — not transformative, but meaningful for a solo operator working tight margins.
The diesel decline is driven primarily by softer crude oil prices and seasonal refinery output increases, not by any structural change in the energy market. Analysts at FTR expect diesel to hold in the $5.20-to-$5.50 range through June and July before potential hurricane-season disruptions could push prices back up. For dispatchers pricing loads, the key implication is that fuel surcharges are declining on a slight lag — the DOE index used to calculate most surcharge tables was still reflecting the higher May prices as of the first week of June. That creates a brief window where carriers are paying less at the pump than their surcharge reimbursement reflects, improving effective margins on booked loads.
“Diesel down, spot rates up, and manufacturing expanding — June 2026 is shaping up to be the most favorable operating environment for carriers since early 2022. But the tariff overhang could change that math overnight.”
— FTR Transportation Market Update, June 1, 2026
The $166 Billion Tariff Court Battle — and Why Freight Should Be Watching
On June 2, 2026, the Department of Justice formally appealed a U.S. Court of International Trade order requiring U.S. Customs and Border Protection to refund importers $166 billion in International Emergency Economic Powers Act tariffs that the Supreme Court had declared unlawful in February. The DOJ is arguing that Judge Richard Eaton lacks the authority to order universal refunds for every importer who paid the levies without filing individual lawsuits.
The stakes for the freight market are enormous. CBP had already begun processing refunds through its Consolidated Administration and Processing of Entries portal, with $85 billion in potential and certified refunds accepted and $20.6 billion sent to the Treasury for disbursement as of May 22. If the DOJ appeal succeeds in pausing or overturning the refund order, billions of dollars that importers were expecting to recover would remain locked up — and those importers would have to decide whether to eat the cost, pass it through to consumers, or reduce inventory orders. Each of those outcomes has direct freight market implications: reduced import volumes mean fewer container drayage and intermodal loads, while cost pass-throughs could dampen consumer demand and soften domestic freight volumes downstream.
The broader tariff picture adds another layer of uncertainty. Cross-border trucking moves 85 percent of surface trade with Mexico and 67 percent with Canada. Retaliatory tariffs from both countries have already disrupted lane economics on key corridors. S&P Global Mobility projects that a sustained 25 percent tariff on heavy vehicles could add roughly $35,000 to the cost of a new Class 8 truck, pushing total acquisition costs toward $238,000 when combined with the 12 percent federal excise tax on the tariff-inflated price. For fleets planning equipment replacement cycles, that math is already delaying purchase decisions and extending the age of the active truck fleet — which in turn constrains capacity and supports spot rates.
Capacity Keeps Tightening — and the Numbers Prove It
The supply side of the equation is reinforcing the rate strength driven by demand and tariff uncertainty. Tender rejections climbed to nearly 17 percent, a cycle high, meaning carriers are turning down nearly one in five loads offered at contract rates — a strong signal that trucks are busy and capacity is scarce. Flatbed spot rates hit $4.32 per mile with rejections above 38 percent, the highest equipment-specific rejection rate in the market. Dry van linehaul rates are approaching levels not seen since the 2021-2022 freight boom, and fuel-adjusted van rates are close to $2.40 per mile.
The Logistics Managers’ Index reached 69.5, and its transportation prices subindex set a record at 96.0 — confirmation from the logistics community itself that moving freight is getting more expensive across the board. Meanwhile, carrier exits continue to outpace new entrants. The capacity that left the market during the 2023-2024 freight recession has not returned, and rising insurance premiums, equipment costs inflated by tariffs, and regulatory compliance burdens are keeping the barriers to re-entry high.
What This Means for Dispatchers and Carriers Booking Loads in June
The convergence of manufacturing expansion, diesel relief, tariff uncertainty, and tightening capacity creates a freight market that rewards informed decision-making and punishes inertia. Here is how to position your operation for the weeks ahead.
- Reprice contract lanes against current spot benchmarks. With spot rates approaching two-year highs and tender rejections at cycle peaks, any contract rate negotiated more than 90 days ago is likely below market. Use DAT RateView or Truckstop rate data to benchmark your top 10 lanes and open renegotiation conversations with brokers whose rates are more than 10 percent below current spot.
- Watch cross-border lanes for tariff-driven volatility. Laredo and El Paso northbound rates jumped 15-25 percent during the IEEPA-to-Section 122 tariff transition. If the DOJ appeal succeeds in freezing the refund process, expect another round of importer behavior changes that could spike or collapse cross-border volumes on short notice.
- Lock in fuel surcharge gains while the DOE index lags. The DOE index used for most fuel surcharge calculations still reflects late-May diesel prices above $5.50. With pump prices at $5.35 and trending lower, carriers have a temporary margin advantage. Book loads now while the surcharge is calculated on the higher index.
- Monitor flatbed demand for manufacturing-linked lanes. The ISM data shows machinery, transportation equipment, and chemical products driving expansion. Flatbed and specialized loads on industrial corridors — Chicago to Houston, Cleveland to Atlanta, Detroit to Memphis — are the lanes most likely to see sustained rate strength through the summer.
- Track the tariff refund case for sudden market shifts. A Federal Circuit ruling pausing the $166 billion refund could trigger immediate importer de-stocking behavior, reducing container and drayage volumes within weeks. Stay informed through FreightWaves and the Thompson Hine SmarTrade blog for real-time updates on the appeal.
The Bottom Line: Three Forces, One Market Direction
The manufacturing expansion, the tariff court battle, and the diesel price drop are all pushing the freight market in the same general direction — tighter capacity, higher rates, and more volatility — but through different mechanisms and on different timelines. The ISM expansion is a sustained tailwind that should support industrial freight demand through at least Q3. The diesel decline is immediate but possibly temporary. And the tariff refund appeal is a binary event that could swing cross-border and import-driven freight volumes sharply in either direction depending on how the Federal Circuit rules.
For independent dispatchers and carriers, the practical takeaway is to book aggressively on lanes supported by manufacturing demand, capture the current fuel surcharge arbitrage while it lasts, and build contingency plans for tariff-driven disruptions on cross-border and port-connected lanes. The macro environment is favorable — but in a market this volatile, the carriers who watch the courtroom as closely as the load board are the ones who will protect their margins when the next shift comes.
