Society has an ever-growing awareness of the environmental conditions that should be preserved during any actions and the need to establish measures aimed at reducing energy consumption and climate change during our various daily activities This means greater awareness of the design and operation of road tunnels. Despite a lack of awareness of this, most tunnels in themselves already actually enhance the sustainability of public transport. This presentation outlines several potential benefits of tunnels as well as various methods that can be taken to optimally increase their contribution to sustainability.