National Route 18 is an Argentine paved highway, which crosses the province of Entre Ríos from west to east. Beginning in San Benito , a few km east of Paraná , at km 451 of National Route 12 , it ends 25 km southwest of Concordia , at km. 240 of National Route 14 . Its route is 227 km. It has been in the process of being transformed into a highway since 2015 .[citation needed]