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We present the results of a design case study focusing on supporting the daily transportation of elderly in Germany. We conceptualized, developed and studied the appropriation of a transportation information system intended to ease switching between different transportation modes. Based on a literature review and a context study with 21 interviews we explored routinized transport mode usage and barriers when switching between modes. Iteratively, we co-designed a transport platform accessible via a website, a mobile app, and an iTV app. We further looked at the appropriation of the platform into the daily lives of 19 persons. Studying the appropriation highlighted different factors that facilitate the adoption of alternative transport options. The factors included reducing uncertainty, complementing transport information with context information (e.g. weather) and providing informational access based on the user's …