Mae'r cynllun, sydd wedi datblygu a gwella ers y cynllun peilot yn 2015, bellach yn cynnig gostyngiad o draean oddi ar bris yr holl deithiau mae pobl ifanc rhwng 16 a 21 yn eu gwneud – nes eu bod yn troi'n 22 mlwydd oed.
The scheme, which has evolved and improved since its pilot in 2015, now offers a third off the fares for all journeys taken by young people aged between 16 and 21 – right up until their 22nd birthday.