In this paper, we present a concept for an open vehicular data interface and describe it’s components and architecture. We discuss the enabled applications in the context of advanced driver assistance systems with a focus on humanmachine interfaces, vehicle-to-x (V2X) communication and context inference systems. We conclude by a presentation of the initial implementation and deployed system. Categories and Subject Descriptors H.4 [Information Systems Applications]: Miscellaneous; H.3 [Information Storage and Retrieval]: Systems and Software General Terms Algorithms, Measurement Keywords vehicular interfaces, context awareness, context inference