Green energy recovery technologies facilitate the transformation of green energy into electricity, thereby reducing reliance on fossil fuels and optimizing the energy efficiency of transportation facilities. This publication analyses the advanced principles of ambient energy recovery technologies in the transport sector, focusing mainly on road and rail networks. The use of thermal energy from heat losses generated by engines and braking devices, the incorporation of solar energy into vehicles and facilities, and innovative wind power solutions that exploit air movement in tunnels or around rail networks are highlighted. Hydraulic energy, magnetic energy and piezoelectric vibration recovery devices are also being explored for their ability to power sensors, vehicles and installations. Despite encouraging results, obstacles remain in the way of improved performance, cost-effectiveness and adaptation to practical circumstances. Intensified cooperation between researchers, industry and policy-makers is crucial to accelerate the uptake of these technologies, while fostering a more environmentally-friendly and resilient transport ecosystem.