Executive Summary
U.S. rail freight continues to post strong performance heading into August 2026, with the Association of American Railroads reporting cumulative volume of roughly 15.2 million carloads and intermodal units for the first 30 weeks of the year—an increase of approximately 3.3% compared to the same period in 2025. Intermodal volume has been the primary driver, rising 3.8% to over 8.4 million units, while carloads increased 2.7% to roughly 6.8 million. The week ending August 1 saw intermodal traffic climb 4.8% year-over-year, outpacing modest carload declines. Key industrial commodities—metallic ores and metals, along with petroleum products—led carload gains for the week. At the same time, the volume surge has placed real strain on major railroad networks, with average intermodal train speeds falling to multi-year lows across several Class I systems. This analysis examines the drivers behind rail’s strong performance, the network challenges emerging alongside the volume surge, and strategic considerations for shippers navigating an increasingly tight freight market.

U.S. Rail Freight Surges: Strong Volumes and an Intermodal-Driven Recovery

(2026年8月美国铁路货运激增：强劲运量与多式联运驱动的复苏)

1 · The Numbers: A Strong First Half for U.S. Rail

Cumulative Performance Through 30 Weeks

The Association of American Railroads (AAR) reported that for the first 30 weeks of 2026, U.S. railroads recorded cumulative volume of approximately 15.2 million carloads and intermodal units, an increase of roughly 3.3% compared to the same period in 2025.

Breaking this down:

• Carloads: approximately 6.81 million, up roughly 2.7% from the same point a year earlier
• Intermodal units: approximately 8.42 million, up roughly 3.8% from the previous year

Intermodal volume has consistently outpaced carload growth throughout the year, reflecting what appears to be a meaningful shift in how freight is moving across the country.

Weekly Performance: Week Ending August 1

For the week ending August 1, 2026, total U.S. weekly rail traffic reached approximately 526,000 carloads and intermodal units, up roughly 2.4% from the same week last year.

The weekly breakdown tells a story of two diverging modes:

• Carloads: approximately 233,000, down modestly, roughly 0.4% year-over-year
• Intermodal: approximately 293,000 containers and trailers, up roughly 4.8% from 2025

This marked the fourth consecutive week of intermodal growth exceeding 4%, according to industry freight reporting.

North American Context

North American rail volume for the week—covering nine U.S., Canadian, and Mexican railroads—totaled approximately 713,000 carloads and intermodal units, up roughly 2.5% from the same week in 2025. The breakdown shows:

• Carloads: approximately 336,000, up roughly 0.5%
• Intermodal: approximately 378,000 units, up roughly 4.3%

For the first 30 weeks of 2026, North American volume improved approximately 2.9% to more than 20.9 million carloads and intermodal units.

2 · The Drivers: Why Rail Appears to Be Gaining Momentum

The Truck-to-Rail Modal Shift

The primary driver of intermodal growth appears to be an ongoing shift of freight from truck to rail. As industry reporting has characterized it, shippers are increasingly moving freight from truck to rail as truckload capacity tightens and rates rise.

The underlying dynamics appear fairly clear:

• Truckload capacity has contracted meaningfully through 2026, with carrier exits, regulatory enforcement, and rising operating costs removing trucks from the road
• Truckload spot rates have surged, with national truckload indices reaching record levels
• Intermodal continues to offer a compelling cost advantage, with savings in the range of 20% to 30% reported on many key long-haul lanes

Industry analysts tracking intermodal trends have pointed to a combination of higher diesel prices—linked in part to disruptions affecting Middle East energy markets—and higher base truckload rates driven by various federal enforcement actions that have reduced trucking capacity, as key contributors to the current volume surge.

The Import Surge

The early stages of another peak import cycle also appear to be contributing to intermodal strength. Industry commentary has noted that the beginnings of another peak import surge, combined with ongoing shifts of truckload freight to rail, have helped boost weekly intermodal traffic.

With U.S. ports projecting record July import volumes approaching 2.47 million TEU, the resulting container movements from ports to inland destinations appear to be flowing increasingly through rail intermodal networks.

Industrial Commodity Strength

On the carload side, seven of the ten carload commodities tracked by AAR finished higher for the week ending August 1.

Leading gainers:

• Metallic ores and metals: up roughly 9.1%, an increase of about 2,000 carloads to approximately 24,000
• Petroleum and related products: ahead roughly 5.9%

Ore shipments have climbed alongside increased domestic steel production, which industry data places up roughly 5.6% year-over-year.

Other gainers included:

• Farm products (excluding grain) and food, up roughly 890 carloads to approximately 17,400
• Grain, up roughly 865 carloads to approximately 22,500

Notable decliners included:

• Coal, off roughly 7.7%, down about 4,760 carloads to approximately 57,450
• Chemicals, down roughly 2.3%
• Motor vehicles and parts, down roughly 5.3%, a decline of about 833 carloads to approximately 15,000

3 · The Network Strain: Volume Growth Comes at a Cost

Slowing Train Speeds

The surge in intermodal volume has placed significant strain on the networks of the major U.S. Class I railroads—BNSF, CSX, Norfolk Southern, and Union Pacific.

An independent rail industry analyst noted in a recent state-of-the-rails commentary that the renewed surge in intermodal loads at the four major U.S. systems since late May has had a predictable effect on network fluidity, with average intermodal train speeds falling to multi-year lows in some cases.

The speed data is notable:

• BNSF and Union Pacific: average intermodal train speeds at roughly a 10-month low
• Norfolk Southern: within about 2% of a 20-month low
• CSX: at approximately a seven-year low

The Volume Surge by Railroad

Second-quarter intermodal volume growth across the major U.S. systems illustrates the scale of the surge:

For the second quarter to date, North American intermodal volume appears up roughly 5.4% overall, and up roughly 7.1% across the major U.S. systems.

The Capacity Challenge

The rail analyst’s broader commentary highlighted the underlying operational tension: none of this should come as a surprise, since volume growth and train speed tend to move in opposite directions. Railroads generally want the volume, and the challenge lies in limiting the damage to speed and on-time performance so that customer experience isn’t meaningfully impaired.

The stakes appear significant. The degree to which railroads succeed in managing this trade-off will likely determine how much of the current volume gain is retained over time, as opposed to flowing back to truck once truck-versus-rail rate relationships eventually stabilize.

Railroads appear to be responding on the labor front. Norfolk Southern has acknowledged crew shortages in some areas and is hiring to boost train and engine crew ranks at roughly half its terminals, while CSX is reportedly hiring conductors at around 40 locations.

4 · Putting the Surge in Context

A More Cautious Read on the Comparisons

Not every analyst views the intermodal surge with unqualified optimism. Veteran intermodal analyst Larry Gross has offered a more measured perspective, noting that while originations were up over 10% in a recent week and over 11% across the past four weeks, the comparison is being made against the low point of 2025 activity—a period depressed by steep China tariffs in effect at the time.

A potentially more instructive comparison: Gross has suggested comparing the most recent four weeks against the final four weeks of the first quarter of 2025, well before that tariff-driven disruption. On that basis, the gain narrows to roughly 4.6%—a figure he considers a more reasonable read on underlying growth.

The Durability Question

Gross has also raised important questions about how durable the current surge is likely to prove. A key open question is whether the market sees typical seasonal gains from current levels and when peak activity will actually occur. Early indications suggest the international peak may be arriving earlier than usual this year, though in recent years the domestic peak has tended to arrive later—in December rather than the previous October norm.

On capacity, Gross has suggested that conditions will likely remain tight through at least the balance of the year, with some normalization possibly beginning sometime in 2027.

On pricing, he has noted that truckload pricing tends to be considerably more volatile than intermodal, given truckload’s greater reliance on the spot market compared with intermodal’s largely contract-based rate structure. It remains plausible, in his view, that the wider rate gap between the two modes—and the traffic surge it has generated—reflects less a deliberate strategic shift by the intermodal sector and more a reaction to prevailing truckload market conditions.

5 · The Structural Shift: Why This Cycle May Be Different

Beyond Purely Cyclical Factors

While Gross’s caution about interpreting year-over-year comparisons is well taken, several structural factors suggest the current shift toward intermodal may prove more durable than a typical cyclical swing.

Regulatory enforcement has removed truck capacity from the market in ways that may prove relatively permanent. The FMCSA’s non-domiciled CDL rule and related enforcement actions have reduced the available driver pool, and industry observers have suggested driver compensation levels have likely ratcheted up in a fairly lasting way as a result.

Fuel price volatility appears to have become something of a structural feature of the current operating environment rather than a temporary condition. With diesel prices remaining elevated and geopolitical risks persisting, rail’s cost advantage over truck seems likely to remain meaningful for the foreseeable future.

Shipper behavior also appears to be evolving. Companies that have shifted freight to rail during this period of truck capacity tightness may prove reluctant to shift back, particularly if rail service levels continue improving as railroads adjust operationally to higher sustained volumes.

The Service Imperative

As the rail analyst’s commentary suggested, the industry’s ability to absorb this volume surge without meaningful service degradation will likely determine how much of the current windfall is ultimately retained. Railroads willing to invest in capacity and crew hiring—even at some near-term cost to operating ratios—may be the ones best positioned to capture lasting market share from this shift.

6 · Strategic Considerations for Shippers

Evaluating Modal Options

The combination of a tightening truckload market and strong intermodal performance creates both opportunities and challenges for shippers reassessing their transportation mix.

Cost savings remain compelling. With truckload spot rates at or near record levels and intermodal rates rising more gradually, rail’s cost advantage over truck on many key long-haul lanes remains significant.

Service reliability warrants attention. The slowing of intermodal train speeds across major railroads suggests service may be under some pressure. Shippers relying on intermodal capacity may benefit from monitoring service metrics closely and building appropriate buffers into supply chain planning.

Capacity may tighten further. With intermodal volumes surging and railroad networks experiencing real strain, capacity could become more constrained on certain key lanes. Early planning and strong carrier relationships remain valuable in this environment.

A Diversification Strategy

The current rail surge reinforces the broader value of modal diversification. Shippers may benefit from maintaining relationships with multiple carriers across both truck and rail, evaluating lanes for potential intermodal conversion—particularly in the 550 to 1,500 mile range—monitoring service performance closely, including on-time metrics and transit times, and planning ahead to secure capacity early, particularly heading into peak season.

Looking Toward 2027

Gross’s expectation that conditions may begin normalizing sometime in 2027 suggests the current tightness could persist through much of the remainder of 2026. Shippers may benefit from planning accordingly, with realistic budgets and proactive capacity securing built into their transportation strategy.

7 · Conclusion: A Market at an Inflection Point

Strong Performance, Real Challenges

U.S. rail freight appears to be enjoying its strongest performance in several years. Through the first 30 weeks of 2026, volumes are running roughly 3.3% higher overall, with intermodal leading the way at approximately 3.8% growth. The week ending August 1 saw intermodal traffic climb roughly 4.8% year-over-year, driven by the ongoing truck-to-rail modal shift alongside rising import volumes.

The Network Strain

That volume surge has come at a cost, however. Average intermodal train speeds across the major U.S. railroads have fallen to multi-year lows, with CSX at roughly a seven-year low and Norfolk Southern approaching a 20-month low. Railroads appear to be responding through hiring to address crew shortages, though these adjustments will likely take time to fully materialize.

A Structural Shift or a Cyclical Response?

The central question facing the industry is whether the current surge reflects a durable structural shift or largely a cyclical response to temporary truckload market conditions. As Larry Gross has cautioned, year-over-year comparisons are somewhat flattered by last year’s tariff-driven lull. That said, structural factors—including regulatory enforcement, sustained fuel price volatility, and evolving shipper behavior—suggest at least a portion of the current shift may prove lasting.

A Practical Takeaway

For shippers, rail appears to be becoming an increasingly important component of a well-balanced transportation mix. The cost advantage over truck on many key lanes remains meaningful, and the service challenges currently emerging appear manageable with appropriate planning. Organizations that evaluate their modal options carefully—and secure capacity early where possible—are likely to be better positioned to navigate this tightening freight market.

This analysis reflects U.S. rail freight performance as of August 2026 based on available AAR data and industry reporting. Market conditions evolve continuously and specific circumstances vary by shipper, lane, and commodity. Organizations evaluating rail and intermodal options should consult with logistics providers and supply chain professionals for guidance tailored to their specific requirements and circumstances.