Tickets and biometric data, cf. car parking in parking garages. Registered and then everything is handled automatically. You pass the barrier and are identified and enter the departure hall. If you have a debt, it must be settled before you are admitted to the departure hall. At the terminus, you are identified again and the cost is deducted from your account. The first trip always takes place only after registration of biometric data. The first journey always takes place on Jo-Jo - the train operator's financial risk. To facilitate the planning of how shuttles are to be used, the traveler is given the opportunity to enter his final station. If this happens, a discount is given on the ticket price.
A similar system for about 100,000 passengers every day already exists in China for the train between Guangzhou and Shenzhen, 147 kilometers with a total of eight stations.