ANALYSIS OF THE INFLUENCE OF CONCRETE AND CLAY SPEED BUMPS ON HEAVY-DUTY TRUCK LEAF SPRINGS. Journal of Engineering Studies and Research, [S. l.], v. 30, n. 4, p. 32–40, 2025. DOI: 10.29081/jesr.v30i4.003. Disponível em: https://jesr.ub.ro/journal/article/view/476. Acesso em: 13 sep. 2025.