Train services on the Vale of Glamorgan Line will be affected by engineering works in the coming weeks.
Transport for Wales says there'll be no rail services this Sunday morning (29th September) as work is carried out between Penarth, Barry Island and Bridgend.
Trains will be replaced with buses until the line is due to reopen at 12.25pm.
The line also be closed the following Sunday (6th October) - on the day of the Cardiff Half Marathon - with passengers from Llantwit Major and Rhoose being advised to take a replacement bus to Barry or Bridgend where they can catch the train or make their own way to those stations.
On the same day, passengers from Barry Island and Penarth heading to the Welsh capital will be able to catch a train in time for the start of the half marathon, after TfW reached new agreements with train crew working on Sundays.
Services from Barry Island will run to Cardiff Central at 8.09am and 8.49am with a train from Penarth starting at 8.45am ahead of the half marathon's 10am start outside Cardiff Castle.
More disruption's expected on Sunday 27th October, when Barry Island and Bridgend services are affected due to separate engineering work between Cardiff Central and Bridgend via Pontyclun, operating at reduced and altered frequencies to accommodate diverted trains.
Services between Penarth and Cardiff Central are currently operating at a reduced frequency - every half hour - on weekdays.
Further details on disruption can be found on the TfW website.

Barry filmmaker takes her documentary to the big screen in New York
Pupils leave their mark on new school at steel signing event
£3m refurbishment plans revealed for Cowbridge Town Hall
Penarth RNLI shop volunteers recognised for decades of service
Cardiff’s National Museum in need of £46m for urgent repairs, says Amgueddfa Cymru chief executive
Future of Colcot and Buttrills sports facilities outlined after consultation
A bid to bring a “vibrant new type of offer” to Llantwit Major promises to provide “artisan food and drinks” to the area
Legacy Leisure invests £120,000 in new gym equipment at Penarth Leisure Centre
New Wellbeing Hub planned for adult day services in Barry
New hygiene waste collection service to be trialled in Barry
Bro Radio celebrates triple Gold success at the national Community Radio Awards
This Halloween dressing up pets might be more trick than treat
Warrants connected to illegal bike use see 11 arrested
Officers given additional powers following King Square anti-social behaviour
Historic Llantwit Major Town Hall clock restored after 15-year effort
New QR codes let residents report overflowing bins across the Vale
Vale Council launches new scheme to tackle chewing gum-stained pavements
Penarth Remembrance Parade will go ahead after traffic management agreement reached
Senedd calls for disused coal tips action and inclusion of Aberfan in school curriculum