23-07-2010, 07:28 PM
Sir,
Contigency is generally to required to recover the service perturbations and the contigency will acts as a buffer. Contigency of 25% is taken in order to design the signaling which gives greater capacity. Sir, Is this value of contigency depends upon the timetable i.e., no.of services needed per hour? In the three aspect signaling i think the maximum distance is to compare with the SBD+33% to determine the over braking. In case of four aspect it is SBD+33%/2. If overbraking exists in a given headway my idea is it can be reduced by over providing MAS continuously with max. signal spacing.
Contigency is generally to required to recover the service perturbations and the contigency will acts as a buffer. Contigency of 25% is taken in order to design the signaling which gives greater capacity. Sir, Is this value of contigency depends upon the timetable i.e., no.of services needed per hour? In the three aspect signaling i think the maximum distance is to compare with the SBD+33% to determine the over braking. In case of four aspect it is SBD+33%/2. If overbraking exists in a given headway my idea is it can be reduced by over providing MAS continuously with max. signal spacing.