Photovoltaic systems for road networks

Decarbonization, energy supply security and sustainability has gained increased attentions globally. This has resulted in increasing integration of renewable energy sources. For instance, a significant penetration of renewable energy both in production and use can be observed in Europe, as its goal is to achieve carbon neutrality by 2050. This is also in line with other strategies proposed to reduce the use of virgin land to be taken and aims for a "no net land take" Europe 2050. The use of renewable energy sources such as solar energy requires significantly more land to generate electricity. This paper presents solutions where already utilised land area for road infrastructure can also be used for solar energy-based power production. Based on extensive review of literature on different concepts for solar cell systems linked to road transport infrastructure, an overall picture of the state-of-the-art and current challenges within this field has been created. Solar roads, PV integrated noise barriers along the motorway and solar roofs for roads are presented with their advantages and technical challenges. Solar PVs and road networks can be a perfect combination to contribute in mitigating the climate impact caused by road transport sector, increased lifespan of road networks and efficient use of land area