6 consortia responded to the RFQ:- CINTRA-SOMA-SREI; - Gammon Infrastructure-OHL Concessions-G S Engineering; - GMR Infrastructure-L&T Ltd-Samsung C&T Corp;- IL&FS Transportation Networks-Unity Infrastructure-Navayuga Engineering-Rizzani de Eccher; - IRB Infrastructure Developers-Hyundai; - Tata Realty and Infrastructure-Autostrade Indian Infrastructure Development-Vinci Concessions Development