Egypt’s NAT awards Cairo Metro Line 3 Phase IV construction contract March 1, 2015 | Middle East & Africa Company News Egypt’s National Authority for Tunnels (NAT) has awarded a contract to France-based companies Vinci and Bouygues Travaux Publics to construct Phase IV of Cairo Metro Line 3. Line 3 Phas... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password