Indian Railways has deployed its investible surplus of nearly Rs 70,000 crore earned between 2004-05 to 2008-09 to increase its productivity, the railway budget said. Railways will invest Rs 2,30,000 crore under the 11th Plan period (2007-12), which is almost three times the amount allocated in the 10th Plan. Railways’ investment outlays have been stepped up from Rs 13,394 crore in 2003-04 to Rs 36,773 crore in 2008-09. In the Plan period, Railways would be completing the work of 4,900 km of gauge conversion, 1,800 km of doubling and 1,100 km of new lines.