I think you are misinterpreting the news article. Those rails aren't in condition to be used, and there weren't any cargo or passenger service at least since the last century. The only service that runs nowadays is cargo from the cement factory in Minas to Montevideo. And the only service that will be added, will be probaly next year or in 2025, from the UPM pulp mill in Paso de los Toros to Montevideo port. Everything else, are sayings of politicians, basically just smoke.