57D in Santa Rita, San Luis Potosí[4] Fed.

80 in San Luis Potosí[5] Fed.

71 in San Felipe, Aguascalientes Fed.

70) is a free (libre) part of the federal highways corridors (los corredores carreteros federales) of Mexico.

[7] The highway runs from its western end in the town of Mascota, Jalisco to its eastern end at Fed.