Operating up to 7 times a day, the service provides:

• Improved links between Powys, Merthyr Tydfil and Cardiff
• Better connections to other bus and rail services along the route, low floor buses with more luggage space, coach seats and tables, improved ticketing and more attractive departure times
• New facilities at Brecon
• Minicom facilities
• Free Wi-Fi
• Serves - Lower St. Marys Street (JP) – Cardiff City Centre
• This service is operated by Stagecoach
  
• Revised and improved TrawsCymru T4 timetable to be introduced on Sunday 2 September 2018
• More Sunday journeys
• Combined hourly service with T14 on weekdays and Saturdays between Brecon and Cardiff
• Attractive fares on offer