Ljubljana, Slovenia.
Temperature: 3°C Clouds: Cloud and Visibility OK
Maribor, Slovenia.
Temperature: 4°C Clouds: Cloud and Visibility OK
Portoroz, Slovenia.
Temperature: 5°C Clouds: Cloud and Visibility OK

Theis cardboard sign contains a dire warning.
This sign says, in Fuđinian Slovene:
Ker nisi kolturn (Because you’re not cultured)
boš imel vse 4 gume prazne drugiÄ? (you’ll have all 4 tires empty next time)
LiÄ?no jih bom jaz (personally will I [do it])
Žali se kerm hoÄ?eš (complain to whomever you want)
It’s almost like a free-form haiku, isn’t it? Too bad the driver is probably too uncultured to recognize it as such.
(Thanks Dejan!)