The global transportation industry is witnessing a transformative shift as commercial fleets are under pressure to modernize due to rising fuel costs, emissions regulations, and environmental awareness. Fleet managers are strategically balancing upfront investments with long-term sustainability goals and regulatory compliance amidst a changing landscape. Commercial fleets traditionally reliant on diesel and gasoline are now considering alternative fuel options to reduce their environmental footprint while maintaining operational efficiency. This shift is driven by incentives, penalties based on emissions, and the necessity to comply with low-emission zones in urban areas. Alternative fuel technologies such as electricity, hydrogen, CNG, and biodiesel offer cleaner combustion and tailpipe emission elimination, each catering to different fleet types and operational needs. Electric vehicles are gaining popularity for last-mile delivery, while hydrogen fuel cells show promise for longer routes. Additionally, CNG and biodiesel are utilized in heavier-duty vehicles. Incorporating alternative fuels can result in significant long-term savings, lower maintenance costs, tax benefits, and improved operational reliability. Regulatory compliance and meeting sustainability targets are driving factors for fleets to adopt alternative fuels, positively impacting brand reputation and aligning with ESG reporting requirements. Real-world fleet settings across various transportation sectors are witnessing the integration of alternative fuel vehicles into daily operations. Companies are replacing aging vehicles with electric models, rolling out hybrid buses, and testing hydrogen-powered trucks for freight logistics. The transition to alternative fuels requires comprehensive infrastructure planning, including charging stations, fueling depots, and training programs for mechanics and drivers. Challenges such as high upfront costs and limited infrastructure still exist, particularly in rural areas, but initiatives like government subsidies and internal education campaigns are facilitating a smoother transition. While there are challenges ahead, the increasing adoption of alternative fuels signifies a positive trend towards cleaner and more sustainable transportation practices in commercial fleets.