40 years ago we had a read-write system based on mechanical trimming of a piece of card and a physical time stamp[1]. It's absolutely possible to roll out a sys

40 years ago we had a read-write system based on mechanical trimming of a piece of card and a physical time stamp[1]. It's absolutely possible to roll out a system to keep track of journeys that doesn't require fancy embedded ICs. [1] https://www.facebook.com/uktvads/videos/kerching-a-saverstrip-in-west-yorkshire-with-a-metro-saver-1983/176086466929586 https://www.facebook.com/uktvads/videos/kerching-a-saverstri...