Most major parades in Mexico City follow the route depicted in the map. It's important to note that some parades and marches will vary slight lyfrom that depicted.
It's nearly always safe to assume that major parades will begin at the Angel de la Independencia. Many, if not most, major parades, will end in the Zocalo. Vehicles will thus be diverted at the Palacio de Bellas Artes. Only pedestrian participants proceed to the Zocalo via Avenida Madero as depicted in the map.
Media outlets do their best to report the exact routes of all parades near the scheduled time of the parade.