sir i donot agree your point --->
"Also there is no fixed time for arrival and departure times at technical halts, i.e. the train may arrive early and leave"
How can it happen.There is change of loco pilots at some of the stations.Obviously loco pilots on duty will come at their own time as allotted to them for their duty.They will not come beforehand.So there will be fixed time of arrival of duronto at the technical halts even.
At...
more... MGS the timing of different durontos were clearly written(few months back i have seen,present i donot know).Moreover even in IRI and erail timing of duronots at tech halt is given