No deje piedras sobre el pavimento is a sign we see frequently while traveling through Mexico. It means, do not leave stones on the pavement.

It’s an interesting and necessary sign that stems from people placing stones on the road behind their car to warn others they are stopped or broken down. The problem arises when these people then drive off and leave the stones in the road creating another road hazard.

So if you ever breakdown por favor, no deje piedras sobre el pavimento.