The construction industry is moving towards reducing its reliance on fossil fuels to achieve net-zero emissions. The METRONET Byford Rail Extension Project is at the forefront of this transition by testing HYDI units, developed by South Australian company HYDI, to retrofit existing diesel equipment and produce hydrogen on demand. This innovative technology aims to address the environmental impact of traditional diesel use by offering a more sustainable alternative. The HYDI unit, utilizing proton exchange membrane cells, can produce hydrogen from distilled water without additional chemicals, providing a cleaner energy source with a higher energy value than diesel. The trial on a CAT 962 loader demonstrated a 19% improvement in fuel efficiency, leading to reduced diesel consumption and lower emissions. The project's next steps involve testing the unit on various equipment to confirm its benefits and achieve a minimum 10% improvement in fuel efficiency. Monthly data tracking will facilitate sharing results with the industry to promote the adoption of this technology. The overall benefits of the HYDI unit extend beyond fuel efficiency improvements, including reduced greenhouse gas emissions, improved air quality by minimizing exposure to diesel fumes, and support for government carbon reduction objectives. Moreover, this innovation fosters a culture of innovation, driving demand for new technologies and aiding in the transition of challenging-to-electrify sectors towards net-zero emissions. The trial aligns with the METRONET Sustainability Strategy, illustrating a concerted effort to reduce the carbon footprint of construction projects through practical implementation of hydrogen technology.