Railway Minister Suresh Prabhu on Saturday said the Railways needs investments of over 100 billion dollar in the next 3 to 4 years to transform itself.Addressing a function in New Delhi, Mr. Prabhu said the government is working on a plan to attract funds including from overseas. He said that the passengers are demanding tremendous improvement in railway services but the government does not have the funds required to meet the scale of investment. The Minister said that he has delegated powers of procurement to general managers in railways, besides setting up a one-man panel to oversee that his decision in this regard is implemented smoothly.