(a) the total staff strength in safety category in the Railways, zone-wise;
(b) whether a large number of vacancies relating to safety are lying vacant in various zones of the Railways and if so, the details thereof, zone-wise;
(c) whether the existing staff is overburdened with work due to such shortage of staff; and
(d) if so, the efforts the Railways is making to conduct a special drive to fill up all the safety related vacancies in all zones expeditiously?