Watch for Peregrinos on the roads
 

It's the 480th anniversary of the appearance of the Virgin of Guadalupe when she appeared to Diego back in 1531.
That means loads of the faithful will be on the highways and secondary roads doing the pilgrimage and that means some delays in traffic and maybe some congestion on the roads in the mountain areas. If you are traveling you will see them all over Mexico. Usually, they have a police escort or some form of traffic warning but be prepared.