The Overground line between Camden Road and Stratford will be shut for the whole of the Easter weekend so a new subway can be installed at Hackney Wick station.
The 2,000-tonne concrete structure has already been built on land to the north side of the station.
Between April 14 and April 17 the track and platforms will be removed and the subway driven into place on rollers.
The new tunnel will provide ground level north-to-south access below the existing railway line, and replace the footbridge that was taken out last month.
The subway is part of a £25million Network Rail scheme that should be complete next year. It is being funded by the London Legacy Development Corporation, and Hackney Council and Tower Hamlets Council, which have both contributed £1m.
Further work includes an illuminated glass wall through the subway to separate paying customers using the station and those who want to use it to walk through.
A new entrance and ticket hall at ground floor level are also planned along with new stairs and two new lifts.
The subway’s design draws on the area’s industrial heritage and waterways, and the wall has been designed to look like “light reflecting off water”.
Comments: Our rules
We want our comments to be a lively and valuable part of our community - a place where readers can debate and engage with the most important local issues. The ability to comment on our stories is a privilege, not a right, however, and that privilege may be withdrawn if it is abused or misused.
Please report any comments that break our rules.
Read the rules here