Roeth: Duty cycles, not hype, determine alternative power success

NACFE's latest "Messy Middle" report analyzes 18 days of data from 14 Class 8 tractors to reveal how different energy pathways—from hydrogen to electric—actually perform in the field.
March 18, 2026
3 min read

Key takeaways

  • Real-World Alt-Fuel Performance: NACFE’s 18-day "Run on Less" study analyzes high-resolution telematics from 14 Class 8 tractors across four energy pathways, including battery electric and hydrogen fuel cell technology.
  • The Power of Duty Cycles: Data confirm that route characteristics and terrain—rather than industry hype—are the primary factors in determining the success of alternative-powertrain deployments.
  • A Standardized Transition Framework: The report introduces a deployment readiness assessment across five dimensions: route/corridor, infrastructure, operational readiness, economics, and sustainability.
  • Navigating the 'Messy Middle': Industry experts Mike Roeth, Dean Bushey, and Yunsu Park provide a transparent roadmap for fleets balancing diesel, CNG/RNG, and zero-emission goals in an evolving regulatory landscape.

We recently released our second NACFE report, Run on Less – Messy Middle. Terrain, Technology, and Telematics: The Messy Middle Operations Report covers operational factors of Run on Less – Messy Middle. The Run measured real-world performance of 14 Class 8 tractors operated by 13 participating fleets across four energy pathways: diesel/renewable diesel/biodiesel, compressed natural gas/renewable natural gas, battery electric, and hydrogen fuel cell.

Dean Bushey, North American Council for Freight Efficiency (NACFE) director of programs, and Yunsu Park, NACFE’s director of engineering, spent a lot of time analyzing and mining the data to see what we could learn from all the data collected during the 18 days of the Run. They applied a standardized and transparent methodology to collect, validate, and analyze operational data across participating fleets. They combined high-resolution telematics capture with qualitative operational context gathered through driver interviews, fleet manager consultations, and site visits.

I am not sure I can say there were any big surprises with what we learned, but many of the assumptions we made going into the Run were validated. One key finding was that duty cycle has a direct influence on technology suitability. We had learned a little about this as it pertained to battery electric vehicles from Run on Less – Electric and Run on Less – Electric DEPOT. And the data from this Run confirmed the applicability of duty cycles not just for BEVs but also for trucks powered by CNG/RNG and those powered by hydrogen fuel cells. And we also learned about the role of renewable and biodiesel.

My advice for fleets navigating the Messy Middle is to match powertrain technology to duty cycles based on route characteristics, infrastructure access, and operational requirements. We also recommend that fleets conduct route-specific analysis before deploying any technology, especially those sensitive to terrain.

Make sure to realistically evaluate the currently available infrastructure for the routes on which you will deploy vehicles. And take the time to train drivers, technicians, and dispatchers on the new technology, on its capabilities and limitations. You will need buy-in from these people if you want to successfully move into a more sustainable movement of goods.

I think we are going to be in the Messy Middle for quite a while, so fleets need to remain flexible because, as technology and infrastructure evolve, they may need to invest in different powertrains than they are using today.

One graphic from the report I think fleets will find very helpful is the one that contains a deployment readiness assessment. It shares the five dimensions—route/corridor, infrastructure, operational readiness, economics, and sustainability—that fleets need to evaluate before making a commitment to a given technology.

This report is long, but it is divided into sections that allow you to focus on a particular fleet, one technology, a cross-fleet evaluation based on a specific technology, or an analysis comparing all four technologies.

This report is rich with data and analysis, and I encourage you to spend some time with it as you try to successfully navigate the Messy Middle. Remember, NACFE is here to be your guide, so contact us to chat about the report.

About the Author

Michael Roeth

Michael Roeth

Executive Director

Michael Roeth is the executive director of the North American Council for Freight Efficiency. He serves on the second National Academy of Sciences Committee on Technologies and Approaches for Reducing the Fuel Consumption of Medium and Heavy-Duty Vehicles and has held various positions with Navistar and Behr/Cummins.

Sign up for our eNewsletters
Get the latest news and updates

Voice Your Opinion!

To join the conversation, and become an exclusive member of FleetOwner, create an account today!