Buses will replace trains on a number of routes across Norfolk, Suffolk and Essex over the Bank Holiday weekend as engineering works start.
Network Rail says the Norwich to Ipswich line will be affected along with the Felixstowe branch line, there'll also be a nine day closure between Southend Victoria and Wickford.
Greater Anglia: Saturday 25 May to Monday 27 May Buses will replace trains between Ipswich and Norwich. Buses will replace trains between Ipswich and Bury St Edmunds.
Saturday 25 May to Tuesday 28 May Buses will replace trains between Ipswich and Felixstowe Town.
Saturday 25 May to Sunday 2 June Buses will replace trains between Southend Victoria and Wickford.
On the roads, an RAC survey suggests 22 million leisure trips have been planned between Friday and Monday, leading to "some extensive jams".
This is eight million more than the late May bank holiday weekend last year and is the most since the RAC began asking drivers about their bank holiday travel plans.
Getaways are expected to peak on Saturday with 6.6 million trips, according to the RAC survey of 1,709 UK drivers.
Highways England said it is removing more than 700 miles of roadworks ahead of the weekend, meaning 97% of motorways and major A-roads in England will be free of cones.