Definition of "realignment"

London Transport announce that a contract worth nearly £1.2 million has been let for civil engineering work entailed in the realignment of the Circle and Metropolitan Lines and the Widened Lines between Moorgate and Aldersgate stations.

1963 October, “L.T. Circle to be diverted”, in Modern Railways, page 262

To enable high-speed running to be maximised on the Western specifically, some signals were re-spaced, while track realignments at seven sites between Acton, Box Tunnel and Bristol Parkway enabled line speeds to be raised.

2021 October 6, Greg Morse, “The need for speed and the drive for 125”, in RAIL, number 941, page 51