The main goal of such information systems is to help the traveller mainly before a journey or in some cases during the same journey at connections to plan a trip. How the Information is Produced These terminals are generally autonomous and use local databases.
Most terminals use colour video screens as output units.
On some terminals the information displayed is relayed or complemented by synthetic voices. Also, the majority of devices are fitted with printers. Although traditional keyboards are still used, the more recent terminals use touch screens as input device. Some studies have shown that the user makes the decision whether or not to use the terminals in only a few seconds. To avoid any failure in the transaction, interaction must be totally intuitive.