(a) the total length of railway tracks in the country;
(b) whether more than 5300 km length of the track is due for renewal and if so, the details of track-wise reasons for the backlog of renewal projects;
(c) whether arrears of track renewal are accumulating year by year resulting in disproportionately high maintenance and reduced reliability of assets and if so, the details thereof;
(d) whether the Railways has prepared any target plan for track renewal during the Twelfth Plan period and if so, the details thereof, zone-wise; and
(e) the steps taken by the Railways to speed up the track renewal works to reduce the maintenance cost and increase the reliability of assets?