"But when the American branches closed down, it didn't seem to have any effect here," he said.
The branch closed completely in 1956, the track being lifted the following year.
The hospital line continued to operate long after the main branch closed to passengers in 1930.
The branch closed in 1953 and the main line in the early 1960s.
The branch closed at the same time as the line to Mansfield.
The branch closed in 1933 and the bridge no longer exists.
What does cut costs, the study said, is the loss of some customers when a branch closes.
The branch closed from 1 May 1964 due no doubt to economic reasons.
The branch is open six days a week and closed on Sundays.
The branch closed on 1 November 1987 and the track has been lifted.