With the new system:
• The validators on the Adelaide Station ticket gates are actual validators, not just checking the ticket/card status. A validation or transfer is recorded every time you use them.
• Where the most recent validation was on an inbound train service, the Adelaide Station ticket gates give you an extra grace period of about half an hour beyond the two hour transfer period to allow a journey with a transfer to be completed.
• If your most recent transfer was not on an inbound train (i.e. it was on a bus, tram or outbound train), then you'll have a new fare validated when you try to exit at Adelaide Station on a Metrocard, or a complete rejection on a ticket.
• You can enter the Adelaide platforms and then leave again through the ticket barriers, because they are actual validators.
• You can re-validate on a round trip even on the same vehicle (because the code relating to the service gets changed at the terminus).
• You can not change cars (i.e. getting off and swapping cars at an intermediate stop) on the same train and re-validate, because the service code will be the same.
The new system also allows a Metrocard to be used for other services, such as the $2 Park and Ride at TTP Interchange or the new bike lockups. An interesting feature of the TTP parking is that a higher casual parking rate of $10 is charged if the Metrocard is not validated to start a trip on a bus afterwards.