Norfolk Southern to buy 40 new Wabtec locomotives as fleet modernization accelerates

Published: February 21, 2026

Norfolk Southern has announced it will acquire 40 brand-new Wabtec ES44AC locomotives, marking the Class I railroad’s first purchase of new locomotives since 2022 and the latest step in a multi-year effort to modernize its road fleet for higher reliability, better fuel performance, and lower emissions. According to Norfolk Southern, delivery is expected in the second half of 2026. After Wabtec builds the units, they will be shipped to NS’s locomotive shop in Chattanooga, Tennessee, where crews will complete final preparation before the locomotives enter service.

Norfolk Southern ES44AC #8000, the railroad's first in the series and originally built September, 2008, is seen here at Princeton, West Virginia on April 19, 2011. Dan Robie photo.

In its announcement on January 22, 2026, Norfolk Southern stated the purchase as part of a long-term strategy to improve productivity and sustainability while keeping a modern, high-horsepower fleet available for customers. The railroad highlighted the ES44AC’s combination of fuel efficiency, reduced emissions, improved reliability, and crew comfort as core reasons for the order.

A key point in the deal is how the locomotives are being financed. Norfolk Southern says it is leveraging emissions credits earned with Wabtec to facilitate the acquisition. In practical terms, using credits helps the railroad refresh its roster while continuing to retire older, less efficient units—an approach consistent with its broader modernization playbook.

That playbook already includes NS’s well-known DC-to-AC modernization program, in which the railroad rebuilds GE Dash 9 locomotives into AC44C6M units as a lower-cost alternative to buying new. Trains.com notes NS has pursued this strategy for more than a decade, often emphasizing that rebuilds can cost significantly less than new locomotives while still delivering meaningful performance gains.

The new ES44AC order complements that rebuild pipeline. Adding new locomotives gives NS flexibility to retire the oldest road power, keep the fleet’s “average age” in check, and handle traffic swings without leaning as heavily on stored power—especially important as customers increasingly expect consistent, scheduled service.

NS is putting particular emphasis on technology inside the new units. The railroad says the locomotives will be built to NS specifications and equipped with the latest generation of control systems supporting real-time remote diagnostics and “live operational views”—likening it to an IT department accessing a computer screen to spot issues early.

Wabtec echoed that theme, saying the locomotives blend sophisticated control systems with remote diagnostics and a network of sensors to improve visibility and reliability—capabilities the company argues also support long-term sustainability goals.

In other words: this isn’t just a horsepower purchase. It’s also an investment in reducing road failures, shortening troubleshooting time, and preventing delays before they cascade across the network.

One detail that generated discussion in early coverage is emissions tier status. Wabtec describes the ES44AC platform as originally designed to meet EPA Tier 2 standards using a 12-cylinder Evolution Series engine (the “GEVO” family) and notes its long-running role as a North American heavy-haul standard. However, Norfolk Southern has confirmed the 40 locomotives it has ordered will be Tier 4 compliant.

The ES44AC

The ES44AC is part of GE’s (now Wabtec’s) Evolution Series—a dominant family of North American road locomotives introduced in the 2000s that replaced the earlier Dash 9 and AC4400CW-era platforms. The ES44AC designation essentially means:

Evolution Series
Special (6-axle road locomotive platform)
44 = 4,400 horsepower class
AC = AC traction motors (strong low-speed pulling power and adhesion control)

Evolution Series locomotives became the default high-horsepower road power across multiple Class I railroads because they combine strong tractive effort with a standardized platform that’s easier to maintain at scale.

For NS, ordering ES44ACs is also a familiar move. The railroad already operates large numbers of Evolution-series units, and adding more of the same general “family” can reduce training and parts complexity compared with introducing a totally new type.

Specifications

GE/Wabtec ES44AC as built for North American heavy-haul service:

Core performance

Horsepower: 4,400 hp
Prime mover: GE GEVO-12, 4-stroke, V12 дизel (12-cylinder Evolution Series engine family)
Traction: AC traction motors, C-C (six powered axles)
Maximum speed (typical gearing): ~70 mph

Tractive effort

Starting tractive effort: ~183,000 lbf
Continuous tractive effort: ~166,000 lbf (at ~13.7 mph, typical)

Dimensions and weight

Length: 73 ft 2 in
Height (to hood top): ~15 ft 5 in
Weight: ~432,000 lb (varies with ballast/options)
Fuel capacity: ~5,000 gallons

Braking and systems

Dynamic braking: Yes
Air brake system (typical): 26L family listed in data references

Notable design features

AC traction & adhesion control: Better low-speed pulling and reduced wheel slip versus older DC-traction road units, especially on grades or in poor rail conditions.
Evolution/GEVO engine family: Designed to reduce fuel consumption and emissions compared with prior-generation GE FDL engines, while keeping horsepower in the same class.
Modern control and monitoring: NS specifically emphasizes remote diagnostics and live operational visibility on its ordered units.

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Norfolk Southern to buy 40 new Wabtec locomotives as fleet modernization accelerates

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The ES44AC

Specifications