In this paper we describe the application of a variation of cultural probing for identifying barriers in the use of public transportation for target groups with visual, cognitive or language-related handicaps. To be able to better focus on the targeted aspect - the barriers - we applied modifications to the traditional cultural probing approach: Users were encouraged to generate data related to the targeted aspect. We found that this approach can produce focused results that can be analysed fast and can help to overcome obstacles related to limitations in verbal skills or expressiveness of the user.