Can you talk underground? We find that conversation is particularly effective 320 meters below the surface. This is our belief after the presentation at the Guido Mine in Zabrze on November 23, 2017, during which we met representatives of the Association of Polish Cities from all over the country. DYSTEN was one of two invited companies from the road traffic and intelligent transport systems industry. We had the opportunity to present the most interesting projects from all over Europe, including transfer centers, integrated stops and variable message signs (VMS/ZZT). The E-paper technology, which we are developing particularly intensively, aroused great interest and the most questions.