Sołowczuk, Alicja. “Modelling of the Impact of Selected Road Features on the Free Speed”. Roads and Bridges – Drogi i Mosty 8, no. 2 (February 4, 2016): 33–62. Accessed May 2, 2025. https://www.rabdim.pl/index.php/rb/article/view/v8n2p33.