Railways Minister Piyush Goyal has said, railway track renewal is government's topmost priority and there is no restriction on the budget. He said Railways Ministry has track renewal target of 4000-4500 kilometres for 2017-18. <br/><br/>The Minister asked officials not to entertain any requests not even from him for letting the trains pass when maintenance work is being carried out. <br/><br/>Talking to reporters in New Delhi, Mr Goyal said, track renewal, replacing old tracks with new is essential for the safety of the railways. <br/><br/>He said all new tracks that had been procured so far were being used for track renewal.'<br/><br/>AIR correspondent reports that the Puri-Haridwar Utkal Express, which derailed in Khatauli in Uttar Pradesh in August this year was running on tracks which were under maintenance. An enquiry later found that the work was being done without authorization.