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The Head and Neck Support device (HANS) was developed to reduce the potentially injurious motions to the head and neck during severe frontal and angled-frontal impacts. The effectiveness of the HANS device has been rigorously proven by extensive HyGe sled test work by Daimler-Chrysler (Germany) and reported in two SAE papers (1,2). The aim of this work was to develop appropriate test methodologies and criteria for a new FIA Test Specification to support the integration of the HANS system into the FIA Formula One and Formula 3000 Championships. The new test specification includes requirements for both the HANS system and the HANS to helmet interface. It was also necessary to formulate an objective geometrical definition for the HANS system. The laboratory test configuration was developed to simulate the loading conditions during a dynamic sled test. TRL conducted both proof and destructive tests, in order to establish appropriate criteria.