Cvitanić, Dražen, and Biljana Maljković. “Determination of Applicable Adjacent Horizontal Curve Radii Using Operating Speed”. Promet - Traffic & Transportation 31, no. 4 (August 23, 2019): 443-452. Accessed October 22, 2019. http://traffic.fpz.hr/index.php/PROMTT/article/view/3088.