I tried to calculate (this being my very first calculation for Module 2).
I also assumed 10 percent contingency, so the headway requirement changes from 120s to 108 sec for non-stopping headway.
With 4 Aspect I got 93 sec and with 3 Aspect I got 118 sec, assuming the "B" to be 1972m (value corresponding to 160kph).
Also, for Fast train following a stopping train the headway is met by 4 Aspect signal.
I will post my calculation soon to have a check.
I also assumed 10 percent contingency, so the headway requirement changes from 120s to 108 sec for non-stopping headway.
With 4 Aspect I got 93 sec and with 3 Aspect I got 118 sec, assuming the "B" to be 1972m (value corresponding to 160kph).
Also, for Fast train following a stopping train the headway is met by 4 Aspect signal.
I will post my calculation soon to have a check.
(29-02-2012, 10:16 PM)kball Wrote: Hello,
I have recently joined the IRSE forum with the intention to sit the IRSE exam this year.
It's been a while since I tried any headway/ braking distance calculations and I would be grateful if someone would be kind enough to look over my calculations and provide some feedback.
Kind regards
KJB