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A flexible system architecture for the rapid algorithmic prototyping of multi-sensorial driver assistance systems is presented, which allows a fast integration of different sensors and actuators. In this so called "algorithmic system" the number of functional components, as well as the features describing the current traffic scene, can be easily expanded or changed. Existing algorithms can be integrated into the algorithmic system without an expense. Due to the implementation of the algorithmic system in ANSI C, the OSEK conformity and the strict separation from the measurement, test and simulation environment, the source code can be easily ported to a control system hardware. The paper describes in detail the structure of the algorithmic system, its different elements, processes and the vehicle integration during different phases of development. The last section shows the advantages of this approach in the prototype developments of a "radar camera ACC" and a "lane keeping support"