calculating the necessary braking distance assuming a maximum operating speed of from
88 km/h to 70 km/h and a caution signal speed limit of 45 km/h using the formula below
are shown in Table 5. As idle running time of eight seconds was used in these calculations
(passenger trains: 10 cars, freight trains: approximately 45 cars).
where S : Braking distance [in]
V1 : Initial braking speed[km/h]
V2 : Final braking speed[kmlh]
A : Idle running time[sec.]
βc : Gradient compensated deceleration [km/h]
βL : Level deceleration [km/h]
r : Gradient [o/oo]
Table 5 Braking distance
These calculated figures show that the maximum speed can be set at 88 km/h when the train braking deceleration is 2.0 km/h/s. However, when the deceleration is 1.0 km/h/s, the maximum speed is limited to 70 km/h.
