Combined Use of GPR and Other NDTs for Road Pavement Assessment: An Overview

Roads are the main transportation system in any country and, therefore, must be maintained good physical condition to provide a safe and seamless flow transport people goods. However, road pavements subjected various defects because of construction errors, aging, environmental conditions, changing traffic load, poor maintenance. Regular inspections therefore recommended ensure serviceability minimize maintenance costs. Ground-penetrating radar (GPR) is non-destructive testing (NDT) technique widely used inspect subsurface pavements. Furthermore, integral use NDTs has received more attention recent years since it provides comprehensive reliable assessment network. Accordingly, GPR been integrated with complementary extend its capabilities detect potential pavement surface distresses features. In this paper, methods commonly combined monitor both flexible rigid briefly described. addition, published work combining other NDT reviewed, emphasizing findings limitations most practical combination methods. Further, challenges, trends, future perspectives reviewed works highlighted, including intelligent data analysis.