Makkah has launched the second trial of a hydrogen fuel cell-powered bus as part of its sustainable transportation initiatives. Overseen by the Royal Commission for Makkah City and Holy Sites in partnership with the Ministry of Energy and other key authorities, this trial is a significant step towards integrating hydrogen technology into public transportation. The initiative, aimed at evaluating the feasibility of hydrogen buses on designated routes, aligns with Saudi Arabia’s Vision 2030 objectives for environmental sustainability. The project also focuses on raising awareness about hydrogen technology's benefits in emissions reduction and promoting clean energy-based transportation solutions. By introducing hydrogen fuel cell buses, Makkah anticipates improvements in the region's quality of life, particularly for pilgrims and Umrah performers, by offering efficient and environmentally friendly transportation options within the holy sites. The trial, part of the broader Makkah Bus Project, prioritizes safety and security with a structured operational plan including designated routes and a mobile hydrogen fueling station. Evaluation during the trial will cover various aspects such as efficiency, performance, sustainability, cost-effectiveness, and passenger comfort. The outcomes of this trial are crucial in shaping the future of public transportation in Makkah towards sustainability and environmental consciousness.