Different cultures have different unwritten behaviours on roads. In the mountains of Italy, drivers give a short honk before entering a turn on a serpentine road, which usually can't be seen around. If there is no responding honk, they will take the full width of the road (making the very tight turn easier and faster). Tourist drivers have to pick up on this :) In much of Europe oncoming cars flash their lights to wa…
In Israel, flashing the warning lights or hazard lights or whatever they're called when driving, means "hey car behind me, you're on high beams and blinding me, please stop". Since moving to the US I haven't found an effective way to signal people about this, they certainly don't understand this signal. Flashing high beams quickly is either a warning about police ahead, or "turn on your damn lights" (there is also a…
Between lifted pickup trucks and shoddy, poorly-aligned aftermarket HID lights, it's probably that a high percentage of them AREN'T using brights, even if it feels like it.