Birmingham New Street’s concourse, which has been in use since the 1960s, will close in April.
Opening up the first section of the brand new station marks the station’s biggest transformation for 40 years and next week Network Rail will be hosting a series of exhibitions to show passengers what to expect.
Chris Montgomery, Network Rail project director said: “We’ve committed to keeping New Street open to passengers throughout the redevelopment and to date, we’ve been able to do most of our work behind the scenes.
“The switchover in April will be the first time passengers see real changes in how they use, and access New Street station.
“By switching off the old station and opening the first half of the new concourse next door, we can keep passengers moving through New Street while we continue rebuilding the existing half of the station and shopping centre above.”
Around 1,000 construction workers are currently on site at New Street.
The £750 million Gateway Project has been described as the biggest refurbishment project in Europe and the biggest construction project outside of London in the UK.
The first of a series of public exhibitions will take place next week on the main concourse at New Street between 7am-7pm on January 15, 16 and 17.
Rail Minister Simon Burns said: “The redevelopment of Birmingham New Street is already proving to be a huge success and illustrates the Government’s commitment to invest in railways and improve one of the country’s major transport hubs.
“We have committed £160 million to this scheme which will deliver a host of improvements including more than doubling concourse capacity and providing easier access and movement for passengers.”