(a) the details of routes identified by the Railways for survey for electrification, doubling, tripling and four-laning in the country during the last three years; State-wise;
(b) the details of routes on which work for electrification, doubling, tripling and four-laning has started/proposed to be started during the above period, State-wise;
(c) the details of projects completed for the aforesaid categories during the above period, project and State-wise; and
(d) the total cost of these projects and the details of cost overrun, if any, due to delay in commencing the work?