Redevelopment of the traffic junction Seestraße / train line in the town centre of Prien occurred in two stages; the first being the construction of a site for the roundabout on the district road RO 17 including separate foot and bicycle paths. The second stage involved rebuilding the existing railway crossing of the German Federal Railways. The district road RO 17 is the main connection between the town centre and the harbour facilities on Lake Chiemsee. The planned construction, with a length of 340 meters, represents one of the central elements of the whole concept.

Traffic is now flowing again after the redevelopment. Constructing the roundabout has improved the character of this stretch of road while tail-backs are now a thing of the past. Road users have benefited from the more easily navigable junction Seestraße/Hallerstraße. Bottlenecks have been removed, construction faults eliminated and the number of accidents reduced, leading to an altogether improved traffic flow: the upshot of which is a clear improvement in the noise and exhaust situation.

The road planning is in accordance with the guidelines for designing roads as well as the relevant recommendations for designing roundabouts. The design planning and execution planning was done using card_1 exclusively.