RETRACTED: Unmanned aerial vehicle for monitoring transport infrastructure K.K. Kim, E.B. Koroleva, A.S. Vataev, A.A. Tkachuk and D.Ya. Monastyrsky E3S Web Conf., 549 (2024) 02015 Published online: 15 July 2024 DOI: 10.1051/e3sconf/202454902015