Abstract
Currently, more and more attention is being paid to monitoring the state of road infrastructure, since it is the public domain of the country. As a result of the large flow of traffic and environmental influences, it leads to wear of the road surface. Timely detection of defects and damage to the pavement allows us to develop effective programs for maintenance and restoration of the pavement, which allows us to achieve significant costs and save time. Currently, fiber sensors are used as a more effective tool for monitoring the condition of the road surface. Since road surfaces are multilayer structures consisting of layers of granular and bituminous materials, the sensors must correspond to the heterogeneous nature and mechanical properties of the pavement materials. Fiber sensors based on the fiber Bragg grating (FBG) meet these requirements. Fiber sensors based on FBG are widely used due to advantages such as long-term stability and durability, good geometric shape, versatility, corrosion resistance, electromagnetic interference protection, low cost and high detection accuracy.