The aim of my master´s thesis is to design documentation, at  the level of study, for roundabout. The area of interest is defined by the crossroad of Lounská, Americká, Bílinská streets and the conection of existing road I/13 . This is the crossroad of local roads, which are functional group C-serving with the serving function. The aim of conversion of existing crossroad on the roundabout is to calm and clarify  the traffic in the locality. There are also designed comunications for pedestrians in the locality. The study is solved in two variant of conection to existing road I/13.