Roundabouts as Safe and Modern Solutions in Transport Networks and Systems 15th Scientific and Technical Conference "Transport Systems. Theory and Practice 2018", Katowice, Poland, September 17-19, 2018, Selected Papers - Macioszek, Elżbieta; Akçelik, Rahmi; Sierpiński, Grzegorz (Springer International Publishing : Imprint: Springer, 2019)