The plastic 16-18 Travel Pass is a smartcard, meaning you have to scan your card on buses and Supertram. Hold your card on the reader near the driver’s cab as you board a bus or hold it on the card readers held by the Supertram conductors. Once the machine
beeps, pay your 80p fare as usual.
On bus and train services that don’t have smartcard readers, or if there's a problem scanning the card, just show it to the driver or conductor as you normally would.