Beware of Speedy Hikers

On my way towards St. Cergue this morning… getting ever closer to where I will cross the border from Switzerland into France…

As I stumbled to an open restaurant for a strong morning coffee, I came upon this curious little sign on the path.

Does it mean, “Beware of speedy hikers”? For slow hikers like me, so we won’t get run over? 🤔🌬