"Railway also plans to bid out large tenders for electrification under the EPC model by 2021, the potential opportunity size is Rs 36,000 Crore. Mega-project of station redevelopment is another area which could offer massive opportunities going forward," the company's annual report said. The entire station redevelopment project for 400 stations across the country is expected to see investments to the tune of around Rs 1 trillion. Early this month, GMR was shortlisted along with eight other industry majors for the redevelopment of four railway stations – Nagpur, Gwalior, Amritsar and Sabarmati – on a public-private partnership (PPP) model.