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Kenworth on the open highway
The Fleet

Every Mile, Engineered.

Late-model power units, maintained to the highest standards and ready for any load, any route.

Power Units

Our Trucks

A look at the power units that move freight across the Commonwealth network — maintained to the highest standards and ready for any route. Tap a card for full specifications.

Freightliner
Long-Haul Sleeper

Freightliner Cascadia

Aerodynamic flagship built for fuel-efficient long-haul running.

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Long-Haul Sleeper
Freightliner Cascadia

Born in 2007 as Freightliner’s aerodynamic flagship, the Cascadia is now in its fifth generation and remains North America’s best-selling Class 8 truck.

  • Debuted2007
  • EngineDetroit DD13 / DD15
  • HorsepowerUp to 505 hp
  • TorqueUp to 1,850 lb-ft
  • TransmissionDetroit DT12 AMT
  • Economy35% over Gen 1
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Peterbilt
Long-Haul Tractor

Peterbilt 579

Premium ride and visibility for high-mileage highway lanes.

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Long-Haul Tractor
Peterbilt 579

Introduced in 2012 to succeed the Model 386, the 579 is Peterbilt’s most aerodynamic, fuel-efficient on-highway flagship.

  • Debuted2012
  • EnginePACCAR MX-13 (12.9L)
  • Horsepower405–510 hp
  • TorqueUp to 1,850 lb-ft
  • TransmissionPACCAR TX-12 AMT
  • Economy9.5–10+ mpg
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Kenworth
Highway Tractor

Kenworth T680

Efficiency-focused cab engineered for reliability on the road.

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Highway Tractor
Kenworth T680

Debuting in 2012, the T680 is Kenworth’s flagship aerodynamic highway tractor, pairing PACCAR power with class-leading efficiency.

  • Debuted2012
  • EnginePACCAR MX-13
  • Horsepower455 hp (up to 605)
  • TorqueUp to 1,850 lb-ft
  • Transmission12-speed AMT
  • Economy~9 mpg
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Volvo
Aerodynamic Sleeper

Volvo VNL 860

Long-haul comfort and safety systems for cross-country freight.

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Aerodynamic Sleeper
Volvo VNL 860

Volvo’s flagship long-hauler pairs a 77-inch high-roof sleeper with turbo-compound D13 power, built for cross-country comfort.

  • Debuted2017 (new 2024)
  • EngineVolvo D13 Turbo Comp.
  • Horsepower455 hp
  • Torque1,850 lb-ft
  • TransmissionVolvo I-Shift 12-spd
  • Economy8.8–9.2 mpg
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Mack
Heavy-Duty Hauler

Mack Anthem

Built tough for demanding loads and high-torque applications.

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Heavy-Duty Hauler
Mack Anthem

Unveiled in 2017, the Anthem marked Mack’s bold return to long-haul highway trucking with proven MP-series muscle.

  • Debuted2017
  • EngineMack MP8
  • HorsepowerUp to 505 hp
  • TorqueUp to 1,860 lb-ft
  • TransmissionMack mDRIVE AMT
  • Economy~8.5 mpg
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Move With Commonwealth

Have freight that needs a reliable carrier? Let's talk.