EFE to upgrade and extend Biotren Line 2, Chile May 23, 2024 | Latin America News, News Empresa de los Ferrocarriles del Estado (EFE) has announced plans to upgrade Biotren Line 2 at an investment of USD290 million. This includes the procurement of 10 new trains, the remodelling of 14 st... This content is available to only subscribers. Username or E-mail Password Remember Me Forgot Password