Executive Summary
May opens with the freight market at a structural inflection point. After three consecutive weeks of diesel softening through late April, the national average increased sharply to $5.640/gallon (EIA, wk ending 05/04/26), the second-highest reading in the trailing eight-week window and just $0.003 below the April 6 peak of $5.643/gallon. That single week of fuel cost movement resets TL surcharges from $0.70/mile back to $0.75/mile (FreightPlus FSC Schedule), directly affecting shipper landed costs on every active contract. The EIA's April 2026 Short-Term Energy Outlook revised the 2026 Brent crude forecast to $96/barrel, up from $79/barrel in March, citing Middle East conflict and Strait of Hormuz supply disruptions (EIA STEO, April 7, 2026). EIA projects WTI will peak near $101.63/barrel in Q2 before easing to $83.66/barrel in Q4. The annual diesel forecast moved to $4.80/gallon from $4.12/gallon, though current spot prices already exceed that annual average, implying EIA expects meaningful relief in H2.
On the demand side, the picture has strengthened materially. The ISM Manufacturing PMI registered 52.7% in April 2026 (ISM Report on Business, May 1, 2026), the fourth consecutive month of expansion and the highest reading in roughly two years. The ISM Prices Index surged to 84.6%, its highest level since April 2022, signaling broad-based input cost pressure across manufacturing. ATA for-hire truck tonnage reached 117.0 in March 2026 (ATA Tonnage Index, April 21, 2026), up 3.0% year over year, the largest annual gain since October 2022. ATA Chief Economist Bob Costello described Q1 2026 as the strongest combined sequential and annual quarter since Q3 2017. These are not ambiguous signals: freight-generating industrial activity is accelerating.
The near-term capacity picture is tighter than the headline spot rate suggests. Dry van truck postings fell 12% week over week while load posts climbed 6% (DAT, Apr 26-May 2, 2026) as produce demand accelerated into southern and western growing corridors. The reefer load-to-truck ratio reached 15.0. Flatbed spot rates hit $3.05/mile, up $0.38 over seven weeks and approaching historical seasonal highs. Layered on top: the CVSA International Roadcheck blitz runs May 12-14 (CVSA.org), with ELD compliance and cargo securement as the inspection focus. Any carrier running with documentation gaps parks rather than risk an out-of-service order. Shippers with freight moving the week of May 11 should have trucks confirmed and increase lead time where possible.
Diesel and Fuel Surcharges
Diesel's eight-week trajectory from mid-March through early May describes a sharp spike, a partial pullback, and a recovery. The national average climbed from $5.071/gallon (EIA, wk ending 03/16/26) to a high of $5.643/gallon (EIA, wk ending 04/06/26) in three weeks, pulled back through late April to $5.351/gallon (EIA, wk ending 04/27/26), then rebounded $0.289 in a single week to $5.640/gallon (EIA, wk ending 05/04/26). The late-April pullback has proven short-lived, and the directional bias heading into peak produce weeks is upward. The EIA projects Brent at $101.63/barrel in Q2 2026 before easing (EIA STEO, April 7, 2026), which is consistent with current spot diesel levels remaining elevated through June.
Source: U.S. EIA Weekly Retail On-Highway Diesel Prices. National average, all formulations.
TL Fuel Surcharge. At $5.640/gallon, the FreightPlus TL FSC schedule yields $0.75/mile, a step increase from the $0.70/mile rate at the April 27 reading. Shippers on per-mile FSC contracts should note the effective date of this step change aligns with pickups after the May 4 EIA publication.
IMDL Surcharge. Intermodal fuel surcharges reset to 44% of linehaul at current diesel levels (FreightPlus FSC Schedule).
Rate Forecast: Then vs. Now
The EIA April 2026 Short-Term Energy Outlook constitutes a material revision from the March edition. The core driver is geopolitical: Middle East conflict and Strait of Hormuz production disruptions (~9.1 mb/d in shut-ins) shifted the crude forecast sharply upward before expected easing in Q3-Q4. The DAT market rate data shows spot-contract convergence accelerating from a year ago, consistent with the freight cycle shift underway.
| Metric | Prior Forecast | Current Forecast | Direction |
|---|---|---|---|
| Brent Crude · 2026 Avg | $79/bbl EIA STEO, Mar 10 | $96/bbl EIA STEO, Apr 7 | ▲ +$17 · Hormuz |
| WTI · Q2 2026 | prior month Q2 WTI | $101.63/bbl EIA STEO, Apr 7 | ▲ Peak Q2 then easing |
| U.S. Diesel · 2026 Avg | $4.12/gal EIA STEO, Mar 10 | $4.80/gal EIA STEO, Apr 7 | ▲ +$0.68 · Crude-driven |
| Van Spot · National | $2.32/mi DAT, Jan 2026 avg | $2.37/mi DAT, Apr 26-May 2 | ▲ 7th monthly gain |
| Spot-Contract Spread · Van | ~$0.39/mi Feb 2025 | ~$0.11/mi DAT, Feb 2026 | ⚠ Narrowing · Cycle shift |
Top Corridor Spotlight · Produce Season Ramp
May basket: four primary produce-season corridors connecting Southeast and Western U.S. growing regions to Northeast and Midwest consumption hubs. Rate data from Greenscreens network prediction model (pickup 05/07/26 vs. 04/07/26 for MoM; vs. 05/07/25 for YoY). Linehaul YoY strips out the fuel rate component to isolate the underlying freight market move.
| Lane | Distance | MoM | YoY | Linehaul YoY | Confidence |
|---|---|---|---|---|---|
| Lakeland FL → Boston MA | 1,385 mi | -1.9% | +8.5% | -11.6% | 80/100 |
| Fresno CA → Chicago IL | 2,132 mi | -7.3% | +18.8% | -4.1% | 75/100 |
| Nogales AZ → Dallas TX | 992 mi | -10.2% | +15.8% | -0.5% | 85/100 |
| Atlanta GA → Boston MA | 1,103 mi | +3.5% | +22.9% | +10.0% | 86/100 |
The Atlanta-to-Boston corridor is the genuine demand story this month: all-in rates up 22.9% YoY and linehaul up 10.0% YoY (Greenscreens, 05/07/26) after stripping fuel. This is the only corridor in the basket where linehaul ex-fuel grew, confirming that real demand is driving the move rather than the fuel surcharge step-change. The lane moves year-round Southeast produce and general freight into the highest-density consumption corridor in the country, and the 86/100 confidence reading makes it the most reliable signal in this basket. The Nogales-to-Dallas lane is down 10.2% MoM but still up 15.8% YoY, consistent with border traffic normalizing after a strong April tariff-pull-forward period that temporarily inflated that lane. Fresno-to-Chicago shows the most pronounced MoM softening at -7.3%, reflecting a brief pause between early spring citrus and the start of stone fruit volumes; the YoY gain of 18.8% confirms the lane is well above last year's depressed baseline. Lakeland-to-Boston is the steadiest lane at -1.9% MoM and +8.5% YoY: Florida strawberry and citrus flows are mature and consistent at this point in the season.
Supply Side: Tightening with Regulatory Overhang
The supply side entered May on a deteriorating trajectory. Dry van truck posts fell 12% week over week while load posts rose 6% (DAT, Apr 26-May 2, 2026), pushing the van load-to-truck ratio higher. The reefer load-to-truck ratio reached 15.0, a level that historically precedes spot rate acceleration across refrigerated lanes. Flatbed has been tightening for seven consecutive weeks. Three overlapping regulatory events in the next two weeks compound the picture.
CVSA International Roadcheck, May 12-14. The annual 72-hour inspection blitz is the single largest near-term capacity disruptor of the month. The 2026 focus areas are ELD compliance and cargo securement (CVSA.org). Carriers with pending violations or incomplete documentation park equipment for the duration rather than risk out-of-service orders. The effective supply reduction typically runs 3-5% of active capacity for the blitz period, with 1-2 days of post-Roadcheck recovery lag. Last year, this dynamic drove market rates up 4.8% WoW versus the week prior. Any freight with a May 12-16 pickup window should be confirmed well before May 11.
FMCSA Motus Registration Deadline, May 14. FMCSA's new Motus portal requires all active carriers to have a registered account by May 14, 2026 (FMCSA.dot.gov). Carriers who miss the deadline risk disruption to operating authority status. Small carriers are disproportionately at risk, which could pull additional capacity off the network in the May 12-16 window, compounding Roadcheck effects.
CVSA Out-of-Service Criteria Updates, April 1. CVSA approved 17 changes to 2026 Out-of-Service Criteria effective April 1, 2026 (FreightWaves, April 2026). Changes raise the compliance bar across brake systems, lighting, and tires. Carriers that have not updated fleet inspection protocols face elevated OOS risk during Roadcheck. The rule changes affect small carriers more acutely than large fleets with internal compliance departments.
Flatbed tightening is structural through summer. Flatbed spot rates at $3.05/mile (DAT, Apr 26-May 2, 2026) are $0.38 above the level seven weeks ago, reflecting sustained construction and infrastructure project demand. Construction season runs through October and will compete for flatbed drivers and equipment across the produce and summer period.
Capacity Calendar · Next 60 Days
Watch list for the next 60 days. Source: FreightPlus internal capacity calendar.
| Window | Event | Expected Capacity Impact |
|---|---|---|
| May 12-14, 2026 | DOT International Roadcheck (Blitz Week) | Drivers park trucks to avoid CVSA inspections (ELD and cargo securement focus); sudden equipment reduction; multi-day disruption across all major corridors. |
| Wks 21-22 · May 18-29, 2026 | Memorial Day Holiday & Network Reset | Long weekend compresses schedules; drivers take time off; post-holiday network rebalancing adds 2-3 days of recovery lag. |
| Through Late June | Produce Season (Peak) | Reefer demand surges nationally; equipment competition in Southeast, Southwest, and West Coast tightens dry van indirectly. |
| Through Late June | Construction Season | Flatbed tightens on lumber, steel, and aggregate shipments; infrastructure projects draw equipment from general freight lanes. |
| June 1 onward | Hurricane Season Opens | Gulf Coast and Southeast vulnerability begins; storm prep and relief freight can displace capacity with little warning. |
| Wks 27-28 · Jun 29-Jul 10, 2026 | Independence Day Holiday | Long weekend capacity displacement; driver home time; expect tighter availability Fri Jun 27 through Tue Jul 8. |
Demand Side: Manufacturing Momentum and Produce Pull
The demand picture is the most constructive it has been since mid-2023. The ISM Manufacturing PMI reached 52.7% in April 2026 (ISM Report on Business, May 1, 2026), the fourth consecutive month of expansion and the highest reading in roughly two years. The ISM Prices Index at 84.6%, the highest level since April 2022, is a secondary signal: manufacturers paying near-record input costs prioritize inbound supply chain speed over cost, which increases tender urgency and drives demand into the spot market. Manufacturing expansion feeds directly into the industrial freight base that anchors the TL contract market.
ATA for-hire truck tonnage reached an index of 117.0 in March 2026, up 0.3% MoM and 3.0% YoY (ATA For-Hire Truck Tonnage Index, April 21, 2026). The 3.0% YoY gain is the largest since October 2022, and ATA Chief Economist Bob Costello described Q1 2026 as the best combined sequential and annual quarterly performance since Q3 2017. While monthly sequential gains remain modest, the direction is unambiguous: the multi-year freight recession that began in late 2022 is functionally over.
Spot-versus-contract dynamics are shifting at the fastest pace in years. The spot-contract spread on van narrowed to approximately $0.11/mile in February 2026 (DAT, March 17, 2026), down from $0.39/mile a year earlier. Van spot rates have posted seven consecutive months of gains through February and are approaching the territory where contract rates negotiated in the 2025 soft market begin to look attractive to carriers. Analysts at C.H. Robinson project approximately +2% year-over-year rate increases for 2026 on a full-year basis, with H2 2026 expected to show more pronounced firming (C.H. Robinson North America Freight Market Update, January 2026). The demand signals in April and early May support the H2 acceleration thesis.
Risk Factors
- Diesel above $5.70. The next FSC step threshold, once breached, lifts TL surcharges to $0.76/mile and compounds all-in rate pressure on contract freight. EIA Q2 WTI forecast at $101.63/barrel keeps this within range.
- Roadcheck OOS cascade. Higher-than-expected out-of-service rates during May 12-14 reduce effective carrier counts for 5-7 days. Motus deadline on May 14 adds a second layer of small-carrier disruption in the same window.
- Produce volume acceleration. If Fresno stone fruit and early-season western volumes arrive ahead of typical timing, reefer LTR could push beyond 15.0 and pull dry van capacity indirectly.
- ISM Prices translate to freight urgency. Manufacturers paying near-record input costs (ISM Prices at 84.6%) prioritize inbound supply chain speed, increasing tender-to-confirm ratios and driving incremental spot demand.
- Diesel pulls back from May highs. If crude retreats on global demand softening, diesel could shed $0.15-0.20/gallon by Memorial Day, dropping FSC one step to $0.73/mile. EIA projects Brent easing to $83.66/barrel by Q4.
- Tariff pull-forward reversal. Freight pulled forward in April ahead of tariff deadlines has already moved. Some lanes, particularly Nogales-to-Dallas, may see a demand air pocket in the back half of May.
- Carrier fleet recapitalization. New Class 8 truck orders have been above trend for two consecutive quarters. If order-to-delivery cycles compress further, capacity could return to market faster than current spot tightening implies.
- Consumer spending softening. If the ISM consumer-facing component diverges from the manufacturing upturn, retail replenishment flows could slow in June, relieving pressure on intermodal and van lanes.
FreightPlus Position
Fuel passthrough. With diesel at $5.640/gallon (EIA, wk ending 05/04/26) and the next FSC step threshold at $5.700, shippers should evaluate whether their contracts reset FSC weekly or on a monthly lag. Weekly reset contracts are more accurate but create more invoice variability. For high-mileage TL lanes, the difference between $0.75/mile and $0.76/mile on a 500-mile move is $0.50 per load, not immaterial on high-frequency corridors. The FreightPlus FSC schedule is transparent and contractually fixed; the primary risk is the diesel trajectory, not the schedule calculation.
Spot vs. contract. The narrowing spot-contract spread creates a decision point for shippers approaching bid season. Carriers who accepted compressed rates in the 2025 soft market are not eager to renew at those levels, and spot rates now provide a credible alternative for the carrier community. Shippers who lock contracts before Memorial Day are likely capturing better rates than those who wait until the June-July produce peak when carrier leverage will be at its seasonal maximum.
Capacity strategy through summer. The combination of Roadcheck (May 12-14), Motus deadline (May 14), Memorial Day (May 26), and produce-season peak in June creates a sustained period of capacity constraint with minimal recovery windows between events. Building at least partial coverage via preferred carrier agreements or volume commitments for the May 14 through July 4 window is a prudent hedge against the capacity calendar.
Contract bid timing. Carriers pricing bids during peak-demand weeks add a seasonal premium that will not reflect the full-year market. Shippers who can defer bid award to late July or early August, after the summer peak, may achieve meaningfully better contract economics. For those who must bid now, structuring contracts with a defined fuel index mechanism and quarterly capacity review clauses provides protection against a market in transition from buyer-favorable to seller-favorable conditions.
Bottom Line
May 2026 is the month the freight cycle shift becomes undeniable. Tonnage is posting its strongest year-over-year growth in over three years (+3.0% YoY, ATA, April 21, 2026), manufacturing has expanded for four consecutive months at 52.7% (ISM, May 1, 2026), and every produce-season corridor in this month's basket is trading above year-ago rates. Diesel has reasserted itself at $5.640/gallon after a brief pullback, resetting fuel surcharges upward and adding real cost back into shipper budgets. The market is no longer in recovery mode. It is in tightening mode.
The near-term calendar is the most consequential in years. Roadcheck (May 12-14) and the Motus registration deadline (May 14) hit the same week, immediately followed by Memorial Day (May 26). Shippers need trucks confirmed, lead times extended, and backup carrier relationships activated before May 11. The capacity that was loose in 2024 and 2025 is not as loose this year, and the events on the calendar will make the difference between shipping on time and waiting in a queue.
Three things to act on: confirm all May 12-16 shipments now and plan for extended lead times; review FSC step exposure if diesel approaches $5.70/gallon (the next step threshold); and decide whether the current spot market window ($2.37/mile van, DAT Apr 26-May 2, 2026) is preferable to a contract rate negotiated at June peak. Contact the FreightPlus Market Intelligence team to model these scenarios against your specific lane portfolio and volume profile.