Running on curves –
(1) For smooth and satisfactory running on curves –
(a) There should be no abrupt alteration of curvature and/or superelevation (cant), and
(b) The superelevation should be appropriate to the curvature, at each point.
(2) On Group ‘A’ and ‘B’ routes, gauge, versines and superelevation on each curve must be checked once in every four months and on other routes every six months. Such checks should also be carried out whenever the running over curves is found to be unsatisfactory. The versines, superelevation and gauge should be recorded by the PWI in the curve register as per the pro forma
Curve registers of groups ‘A’ and ‘B’ routes should also be provided with cumulative frequency diagrams for each curve to get a graphic idea about the condition of geometry of curve. The A.E.N shall check at least one curve of each Permanent way Inspector every quarter by taking its versine and superelevation as well as gauge from end to end. The decision to realign should be taken by the Permanent Way Inspector-in charge or Assistant Engineer. The realignment of curve should be carried out in dry season and not during rainy season except when this is unavoidable.
Criteria for realignment of a curve:
