These calculated figures show that the maximum speed can be set to 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.
(5) Headway
Headway consists of expressing the interval between preceding and following trains under normal operating conditions in units of time. The distance spacing in this case is the interval between two trains when the following train has reached the position relative to the preceding train where blocking requires braking operation (roughly three block sections).
The headway is the time required for the train to run over this section.
The headway is calculated for each signal in automatic block sections, then a margin (about 10 seconds) is added to the largest value and the results are used as the minimum headway for the railway division in question.
Accordingly, the minimum headway differs according to the signal positions, block section length, train length, acceleration, deceleration and other factors. However, the stopping time
