Signals and Telecommunication Journal Jaka Stele, Katja Koren Ošljak, Urša Primozi 8 1 2019 http://www.dline.info/stj/fulltext/v8n1/stjv8n1_2.pdf Interconnected digital signage is an important driver of enhancing the experience of living in a Smart City, as it creates a transparent and accessible platform to help a city translate information and communication technologies into better public services for citizens. But just as e-signage presents an opportunity for a city’s development, it is not without its challenges: to enable a truly smart, and therefore sustainable and green urban living space, digital signs should 1. support energy saving features; 2. be implementable even at the most demanding of locations, power grid or no; and 3. feature superb visibility in all light conditions. Ticking all of these boxes are smart signs developed on electronic paper technology. Following is an overview of potential e-paper implementations in a Smart City as illustrated by examples of signage that Visionect, a high tech company developing the technology for smart and sustainable e-paper signs, has helped implement in the mobility sector across the globe.