IMPROVEMENT OF ROUTE 597, SECTOR: CAR^N-TULAHUEN, ( LIMARI PROVINCE, IV REGION B (NEW 2022) , Engineering study for the replacement of the Cuncumdn Bridge on route D< 835; Commune of Salamanca; Province of Choapa Region of Coquimbo and ADVICE TO THE TAX INSPECTION EXPANSION OF ROUTE 41 - ( CH SECTOR: LA SERENA-LAS ROJAS SECTION 1 (NEW 2021) (EXPIRED)