Thanks to the new communication technologies there are new public signs on the horizon.

“Touch and Travel eliminates the need to purchase tickets prior to boarding a bus or train, making travel faster and less complicated as passengers will be able to use their mobile phone as a ticket. The ticketing information is securely stored on the cell phone’s SIM card and can be checked although the batteries have run down.
The technology behind, Near Field Communications, is a new short-range wireless connectivity technology that evolved from a combination of existing contactless identification and interconnection technologies. Products with built-in NFC will dramatically simplify the way consumer devices interact with one another, helping people speed connections, receive and share information and even make fast and secure payments.”

via Touch by Timo Arnall