What was going on at the time?
Nothing. I think it's an ordinary warning sign for wrong-way driving, meaning to be careful. We in Germany simply call those drivers "Geisterfahrer" ("ghost driver"), because many of them die and/or kill innocent drivers.
Nothing. I think it's an ordinary warning sign for wrong-way driving, meaning to be careful. We in Germany simply call those drivers "Geisterfahrer" ("ghost driver"), because many of them die and/or kill innocent drivers.