Dinh, D.D. and Dung, L.T. 2020. An application of direct method and ball-bank indicator method to determine advisory speeds for horizontal curves in Vietnam. Journal of Science and Technology in Civil Engineering (JSTCE) - HUCE. 14, 1 (Jan. 2020), 136-145. DOI:https://doi.org/10.31814/stce.nuce2020-14(1)-12.