Standby screen - showing some beautiful images of the city
Standby screen - when gets dark the system changes the picture for a night landscape
Error screen - the passenger shows the card, but the balance is insufficient
Pass screen - the card is validated and the user can go on. Note that has a counter to show the time that the user has to pass
Operational mode - the trip is only initialized when the operator shows his id
Operational mode - the operator is valid and ready to go
Operational mode - bus in standby waiting for the next trip