The Railway Board has been asked to submit the preliminary report by June 30, sources said. There is a precedence of the centre helping the Railways with a one-time financial assistance during the Nitish Kumar rule, they said. There is a requirement of installation of train protection warning system (TPWS) which requires massive investment. The Railways have also decided to phase out all unmanned level-crossings which is a major cause of accidents across the country. There are about 14,000 unmanned crossings across the country.