Feasibility study of a 2-axled vehicle for the London transport northern line measured rail and wheel profiles and conicity data (TM-DOS-112)

Four sites were measured encompassing a range of curve radii. The two at Kennington were right handed curves of 100 m and 200 m radius and the two at Waterloo were 400 m and 880 m left handed curves. Rail profile measurements were taken at equi-spaced intervals around the curves.