1. 2022 Bridge Report;Black,2022
2. Highway Statistics 2020;FHWA,2020
3. Status of the nation’s highways, bridges and transit condition and performance report;FHWA,2022
4. 2021 Report Card for America Infrastructure;ASCE,2021
5. A virtual-reality-based training and assessment system for bridge inspectors with an assistant drone;Li;IEEE Trans. Hum.-Mach. Syst.,2022