60 meters
Yes!
500 feet.
If you can see his headlights, drop your high beams. In some states its the law 300 feet at least.
300 Feet.
500 feet
500 feet
1,000 feet.
Same as during the day. It doesn't change from the day just because its dark out.
A vehicle traveling 60 mph travels 88 feet in one second. In order to be able to see, evaluate and make decisions about situations at night, one should be able to see clearly at least six seconds ahead. That works out to about 175 yards minimum -- the more the better. That's with LOW beams. High beams should extend your vision out to at least a quarter of a mile.
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 depends on the conditions
If an oncoming car has its high beams on, you should avoid looking directly at the lights and instead focus on the right side of the road. This will help you maintain your visibility and minimize the glare. Additionally, you can slow down slightly, but be careful not to suddenly brake or swerve as it can be dangerous.