Warum ist das vom Kai fahrende Auto ein Symbol von Vilnius?

This was protest symbol against current government. The sign first emerged with word culture instead of car when pasta factory owner was assigned as minister of culture. Later the same symbol reused when current government started pushing censorship and propaganda machine laws for national television and radio law. Sign was modified with words „free speech“ in place of a car.

Edit first part was reversed by government quite quickly – not big of a deal for government. Free speech part took longer (half a year) and they still managed to sneak in some bullshit in to the law because current government cannot get any positive coverage other way.