https://irse.signalpost.org/ Tue, 30 Jun 2026 22:15:28 +0000 MyBB https://irse.signalpost.org/showthread.php?tid=2304 Tue, 28 Aug 2018 10:18:18 +0000 REMBrum]]> https://irse.signalpost.org/showthread.php?tid=2304 https://irse.signalpost.org/showthread.php?tid=1460 Wed, 21 Aug 2013 08:50:41 +0000 DLMC]]> https://irse.signalpost.org/showthread.php?tid=1460
1) In question 1b signalling system determination, the calculation of 3 and 4 aspect headway is around 120 seconds and 90 seconds respectively. How shall I determine the choice of signalling system? Shall I base on the number of trains per hour between D and H? i.e. 5 trains per hour and so 3 aspects is a cost effective solution to fulfill the headway requirement.

2) for the re-entry time, is it mean the stopping headway plus the 5 minutes of layover time at B?

Thanks]]>
1) In question 1b signalling system determination, the calculation of 3 and 4 aspect headway is around 120 seconds and 90 seconds respectively. How shall I determine the choice of signalling system? Shall I base on the number of trains per hour between D and H? i.e. 5 trains per hour and so 3 aspects is a cost effective solution to fulfill the headway requirement.

2) for the re-entry time, is it mean the stopping headway plus the 5 minutes of layover time at B?

Thanks]]>