ZHENG L, YANG L, ZHENG Z, WANG Y, XU J. Influence of Urban Underground Spiral Ramp Curve Design on Vehicle Running Performance. PROMTT [Internet]. 2026 Feb. 24 [cited 2026 Feb. 26];38(2):340-57. Available from: https://traffic2.fpz.hr/index.php/PROMTT/article/view/933