Tender Announcement From: Adif - Board Of Directors. Purpose: Execution Of Works On The Platform Extension Construction Projects, And Improvement Of Accessibility, Evacuation And Ventilation In Case Of Fire At The Laguna And Embajadores Underground Stations (Phase Ii) And Treatment Of The Platform Between The P.K. 1+300 And 3+000. Line L920. Atocha-Móstoles Tunnel Section. Line C5 Of The Madrid Cercanías Network. File: 3.26/06110.0097.