This paper presents a study on user difficulties with parking meters. Using known Human-Computer Interaction (HCI) concepts as a guide, we explore the reasons for these difficulties and propose recommendations for designers of parking meters to improve the usability and experience. This paper also considers the applicability of these learnings to similar technologies that are of interest to HCI. CCS CONCEPTS • Human-centered computing → Usability testing • Humancentered computing → User models • Human-centered computing → User studies
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