Another type of derailment is when widening of the gauge causes the wheels to fall inside the tracks. This is caused by a lack of lateral strength of track or lack of rail lilting resistance, and the only remedy is to increase it.
2.2 Riding Quality
Riding quality is a psychological and physiological reaction of passengers. It varies significantly according to the individual and his conditions, and is not easy to judge in quantitative terms. In Japan, a riding quality coefficient established by statistically processing the views of numerous passengers (experimenters) and measured values for vibration is used as a basis for evaluation. (See Fig. 2.)
