Network Rail is to start a six-week consultation about improving the cross-country rail link from Ipswich to Peterborough.
It is looking to spend hundreds of millions of pounds improving the track between Soham, on the line between Bury St Edmunds and Ely, and the three-way Ely North junction.
The proposals include doubling the track between Soham and Ely, and re-designing all the junctions and level crossings in the area so more trains can use them and travel faster over them.
The improvements would double the number of passenger trains between Ipswich and Peterborough to one an hour in each direction and doubling the number of freight trains to and from Felixstowe to two an hour.
People can have their say on the proposals by visiting the Network Rail website between May 24 and July 4 - the site is already live with details of the proposed changes.
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