Network Rail is to unveil plans to reinstate a fourth track between Huntingdon and Woodwalton as part of its railway upgrade plan in the area.
The public body said that it would be displaying its plans for more trains and reduced journey times on the East Coast Main Line at four public information events being held in Cambridgeshire next week.
The project will reinstate nearly 10km of track on the east side of the railway between Huntingdon station and Woodwalton, and remove the level crossing at Abbots Ripton.
Network Rail said that it would remove a critical bottleneck between London and the North by allowing fast trains to overtake slower ones, increasing the number of services that could run and improving reliability.
A website outlining more detail on the project will be available from 4 July.