Speed spectrum of four-wheel wagon plain-track derailments 1968-1976 (TM-FT-065)

Four-wheel wagon plain-track derailments generally occur in two categories:- 1. Slow-speed types mainly on secondary lines. 2. Maximum-speed types on main lines. Although it is B.R. policy to aim to reduce the incidence of all types of derailment, the most dangerous and disruptive ones are clearly those...