09-04-2012, 01:24 PM
Thank you peter...
(05-04-2012, 04:05 PM)PJW Wrote: The time it takes for a driver to become aware that there is a signal in their field of view and to distinguish the aspect and determine the appropriate response is what is meant here. This is a TIME and thus when converted to distance does depend upon the speed of the train.
I am aware that in India the term "sighting distance" means not only this time but also the time to brake to the subsequent red aspect, which of course is highly dependent upon train speed. However this is not the meaning of the term in the context of this post or this style headway calculation. Be careful not to become confused by the different meaning of terms by different people in different contexts. This is why in the exam you should ALWAYS EXPLAIN, not just assume that the examiner will interpret things as you intended.
(05-04-2012, 05:59 AM)kiran218 Wrote: Dear peter,
Sighting distance does depends on the speed of the train.
with regards,
kiran