Drafting Of The Construction Project And Execution Of The Necessary Works For The Renovation Of The Level Crossings In The Pp.Kk. 18/055, 18/854, 19/020 And 19/338, And The Improvement Of Protection Of The Level Crossing At The P.K. 17/863 Belonging To Line 140 Tudela Veguín-El Entrego Branch In The Province Of Asturias.