Headlight flashing attracts attention, and so can be considered the visual equivalent of blowing the horn. Indeed, some car owner's manuals identify headlight control on the steering column as the "optical horn". Like the horn, it has many uses. Headlight flashing can let other drivers know of one's presence. 
Honking at someone for being "Slow" is a violation of the horn law and flashing the highbeamsatsomeone for going slow (expecially at night) is illegal use of highbeams AND endangerment. ... See above, it's not illegaltoflash headlights to indicate the intention to pass, not to mention it'sILLEGALto drive the speed limit in the left lane ...
Dec 22, 2015 · HighBeams. Highbeams must be dimmed when approaching traffic is within 500 feet. Highbeams must also be dimmed when following within 300 feet of another vehicle. Hazards. Hazard lights are restricted when driving. They may only be in use when the vehicle is disabled. Arizona. Headlights. Headlights must be in use from sunset to sunrise.
Is it illegal to leave your brights on? Bright lights are not legal. According to traffic law and accident law, bright lights aren’t illegal. Motorists are advised to use their high beams as they navigate through dark areas. The front of the car’s