Fertagus is a commuter rail operator connecting Lisbon, Portugal's capital, to suburbs on the Setúbal Peninsula, located to the south across the Tagus River. Fertagus crosses the river over the Ponte 25 de Abril.Fertagus is owned by the Portuguese transportation company, Grupo Barraqueiro. The company's name derives from caminhos-de-ferro, meaning railway, and the Latin form of the river Tagus (which coincides with the English name).Fertagus is the first private rail operator in Portugal.