RPM
Established Member
No reason for a swipe/RFID card to fail. If in doubt, simply back it up with a PIN code option.
The code/accepted card list would be changeable over-the-air, most likely with a small embedded SIM on the train that allows the train to be in two-way data communication, almost certainly useful for other things too. Unless there's already some form of data communication on existing trains that can be used instead? I guess any train with onboard Internet is already sorted.
Oh please no! Yet another electronic system to go wrong all the time. I can see it now. "We're sorry to announce this train has been cancelled because the driver can't get into his cab".
Lets just keep it simple.:roll: