Train services on the Vale of Glamorgan Line are being disrupted by major engineering works this week.
Network Rail says all journeys between Cardiff Central and Penarth, Barry Island and Bridgend (via Barry) will be affected between Saturday 29th March and Friday 4th April.
Replacement bus services are running throughout the week.
The essential work will see 12 engineering trains being used to install new rail tracks and to replace sleepers and points.
Teams will also be working on vegetation management, examining structures along the track such as bridges and retaining walls, as well as removing grafitti and litter in various locations.
Network Rail says the works will be completely "as efficiently and safely as possible" with disruption being kept to a minimum for passengers and nearby residents.
Nick Millington, Wales and Borders route director at Network Rail, said: "We are working really hard to improve train service punctuality and this essential work is a part of our commitment to do that."
“We recognise there is never a good time to close the railway, but we have planned the renewals to minimise disruption as much as possible."
“I would like to thank passengers for their patience and urge them to check their journeys before travelling.”

Belova app aims to bring people together across Cardiff and the Vale
Road rage arrest after driver allegedly threatened motorist with hammer on A4232
National Grid shares plans for new Aberthaw substation development
Petition to save ward at Llandough Hospital gains hundreds of signatures
Gas Pipe Upgrade Work in Dinas Powys Approaching Completion
Tributes Paid to Barry Athletic Stalwart Terry Collins
New ALN Sixth Form Opens in Vale as Education Minister Visits New School
Jepkosgei sets new course record as Cardiff Half Marathon welcomes record international field
Bro Radio partners with Hospital Radio Glamorgan for Cardiff Half Marathon coverage
Senedd Members reject Reform bid to scrap 20mph speed limits
Barry Town Council Cuts Public Opening Hours After Rise in Abuse Towards Staff
Opposition leaders clash with First Minister over Welsh independence
Santa’s Cause returns as Vale communities urged to support families this Christmas
Elderly Penarth couple call for generator to be relocated or replaced on health grounds
Police Appeal After Two Injured in Late-Night Fight Outside Barry Nightclub
Graduate turns personal experience into campaign to combat student loneliness
Further education one of Wales’ “greatest success stories” says former education minister
Vale of Glamorgan Football League Round Up 26/9