>In much of Europe oncoming cars flash their lights to warn others about dangers and (especially) speed traps or police checks, so they can slow down in time. >

>In much of Europe oncoming cars flash their lights to warn others about dangers and (especially) speed traps or police checks, so they can slow down in time. >Here in Lithuania, flashing your warning lights (the four orange ones on the corners of the car) means thanks, Those behaviours are common in Ireland too