The University of California, Riverside and the University of Michigan have come together with industry leaders such as Daimler Truck North America to establish the Hydrogen Engine Alliance of North America (H2EA-NA). This alliance aims to advocate for hydrogen as an alternative fuel source for internal combustion engines, particularly targeting over-the-road trucks. Co-directed by prominent professors in chemical and environmental engineering, the alliance seeks to leverage hydrogen to improve the performance and sustainability of internal combustion engines, presenting a reliable solution for applications where battery-electric or fuel cell vehicles may not meet performance requirements. Partners in this initiative include Daimler Truck North America, Cummins, Mahle, Forvia, and Tenneco. While DTNA is currently testing vehicles with powertrains utilizing hydrogen in internal combustion engines, they are also advancing in hydrogen fuel cell electric truck development, as evidenced by the Mercedes-Benz GenH2 Truck. Testing of these hydrogen-powered trucks is ongoing in Europe with notable companies like Amazon, Air Products, and Holcim participating. Daimler Truck is working towards establishing subcooled liquid hydrogen (sLH2) as a common refueling standard for hydrogen-powered trucks. To ensure a sustainable hydrogen supply, Daimler Truck has partnered with Abu Dhabi and Kawasaki Heavy Industries in sourcing green hydrogen using renewable electricity. On the other hand, Cummins is planning to introduce a hydrogen internal combustion engine configuration for their X15 heavy-duty truck engine as part of their initiative to offer multiple fuel options with lower emissions. Overall, this partnership signifies a positive step towards harnessing hydrogen technology for the transportation industry, emphasizing sustainability and innovation in engine technology.