The Object Of The Contract Consists Of The Execution Of The Facilities Not Included In The Works Of The Expansion Of Line 11 Of The Madrid Metro, Plaza Elíptica – Conde Casal Sections (File A/Obr-036452/2021) With Interchange Stations At Atocha Renfe, Conde De Casal And Palos De La Frontera And New Stations In Comillas And Madrid Río.