Definitely not local. Pretty much a given in Lithuania too. If someone lets you in etc, it's just rude to not flash emergency lights. Even if somebody squeezed

Definitely not local. Pretty much a given in Lithuania too. If someone lets you in etc, it's just rude to not flash emergency lights. Even if somebody squeezed in like total dickhead during a rush hour We use headlights to warn of friends waiting on the other side of the bush though.