Jennifer Rumsey, Chair and CEO of Cummins Inc., highlighted the evolving landscape of trucking energy transition at ACT Expo 2025. Regulatory changes demand a diverse approach, prompting Cummins to invest in various powertrain technologies. The focus is on diesel engines, natural gas, biodiesel, hydrogen, battery-electric, fuel cells, and hybrids to cater to different applications and environmental goals. Understanding lifecycle emissions is crucial for fleet managers, as seen in PepsiCo's adoption of multiple technologies to reduce carbon footprint. Diesel engines continue to evolve, with Cummins achieving significant fuel efficiency improvements and emissions reductions. The upcoming X15 engine promises further advancements. Hybrid and electric solutions are on the rise, bridging traditional and electrification needs, with battery costs decreasing. Rumsey's optimistic outlook stresses the importance of fair regulations, lifecycle-based standards, and ongoing innovation for a sustainable industry future. Collaboration and embracing diverse technologies are key for success in the ever-changing trucking sector.