In one of our reports coming up on ITV News Anglia (6pm tonight) Claire McGlasson is at the Nene Valley Railway in Peterborough.
The Peterborough to Rugby line was one of the railways shut down after the Beeching report in 1963.
Brian White, curator of the museum, said: "This line was principal in making Peterborough the large city that it is today.
"On the day it opened they suggest that the interest in the railway doubled the population of Peterborough. It brought a lot of people into the city and industrially it was important."
More top news
Tonight will be chilly with lows of 3 deg C ( 37 deg F ) but tomorrow will be generally fine and sunny.
A man has been left with life-changing injuries following a crash in Essex in which five people were hurt.
A seven year old girl has died after being pulled from a swimming pool near Beccles. She was taken unconscious to hospital but later died.