Yusof Zaki, M.R. and Abdul Hamid, S.B. 2024. A NOVEL APPROACH OF NON-DESTRUCTIVE TESTING FOR W-BEAM GUARDRAIL DEFECT DETECTION USING SURFACE WAVE TECHNOLOGY. Journal of Civil Engineering, Science and Technology. 15, 1 (Apr. 2024), 69–77. DOI:https://doi.org/10.33736/jcest.5916.2024.