A quarter mile. If not correct answer - change the law.
California law states - Your high beams have to be dimmed within 300 feet of following another driver and within 500 feet of an oncoming driver.
Headlights should be dimmed as soon as the driver is aware that another vehicle is heading towards him, and would be dazzled, even if still in the distance.
300 feet
At night a driver should dim his headlights when an oncoming motor vehicle comes within 1,000 feet. You should switch your headlights from full beam to dipped beam when a oncoming car passes. It is unsafe to leave your headlights on full beam as it blinds the driver of the oncoming car.
The headlights illuminate the road ahead of the vehicle allowing you to see in the darkness.
At night a driver should dim his headlights when an oncoming motor vehicle comes within 1,000 feet. You should switch your headlights from full beam to dipped beam when a oncoming car passes. It is unsafe to leave your headlights on full beam as it blinds the driver of the oncoming car.
It perfectly depends on where you live or drive. You should dim your headlights right when you see another vehicle in front of you or right when you see the lights of another vehicle. It doesn't matter if you are seeing the tail lamp (both of you are traveling in the same direction), you should dim the lights or else it is going to make difficulties for the driver in front.
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At night a driver should dim his headlights when an oncoming motor vehicle comes within 1,000 feet. You should switch your headlights from full beam to dipped beam when a oncoming car passes. It is unsafe to leave your headlights on full beam as it blinds the driver of the oncoming car.
NO!!
Think of it this way, when you see a vehicle. more then likely it sees you, so try to lower the high beams as soon you realize another vehicle is infront of you. The law in Oregon is 350 feet.
It is another name for a driver's licence.
The driver that hit the parked vehicle would be at fault.