(2) Monitor stability of the bogie
In order to obtain the stability of bogie, the horizontal
acceleration sensors are installed on the bogie frame. When
the horizontal acceleration is found beyond permission, the
driver is informed and the train is decelerate and then
accelerate again. If unsteadiness phenomena reoccur in the
process of acceleration, it is confirmed that it is the question
of bogie itself but not line questions. Then the train should be
driven at low speed.