NACFE’s Terrain, Technology, and Telematics: The Messy Middle Operations Report covers operational factors of Run on Less – Messy Middle. The Run measured real-world performance from 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.

Cross-fleet insights are provided by powertrain as well as a cross-fleet comparative analysis across all fuel types. The data confirms a central reality of the Messy Middle — there is no single technology capable of addressing every freight application with optimal economics, environmental performance, and operational simplicity.