It was expanded in 1829 and converted to operation according to the latest Auburn system ideas.

This area was converted to free operation at a point in early 2000, prior to the closure.

Thus in 1928/29 the existing lines were converted to third-rail operation.

By 2014, all trains should be converted to driverless operation.

At the end of March 1989 the lighthouse was converted to automatic operation.

Route 521 converted to rigid operation on 1 September 2009.

It may be converted to electric operation in the future.

The line was converted to electrical operation in 1907.

From 15 May 1933, the 18.61 km long line was converted to electric operation.

In around 1896, it was converted to electrical operation.