43D in San Juan Benito Juárez[4] Fed.

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

43 connects the city of Salamanca, Guanajuato in the north to the capital of Michoacán, Morelia in the south.

Near Morelia it begins as a highway to cross the bridge over Lake Cuitzeo, just north of the intersection of Fed. 15.

The highway connects the cities of Cuitzeo, Moroleón, Uriangato and Valle de Santiago.