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.
300 feet
According to Florida, Driver's Handbook page (28) night driving.
if you are behind other vehicles, use low beams when you are within 300 feet of the vehicle ahead.
500 feet for oncoming traffic and 300 feet when following closely behind another vehicle.
Source: Kansas Department of Revenue, Division of Vehicles
Within 500 feet.
As soon as you can see them.
500 feet
100 ft
At night is is hard to judge distance so a better way is to dim your lights as soon as you see the lights of the oncoming vehicle
5.15 feets
three feets
feets, shoes, thangs, soles, rubber, roots, chrome, etc...
1 meter = 3.28084 feets (rounded) . . 426 meters = 1,397.6 feets (rounded)
2 feet (not feets) is 60.96 centimetres.
10x10=100 ft
1 yard are 3 feets
157 centimeters is 5.15 feet.
50 feet (not feets) equal 15.24 metres (not maters).
1 yard = 3 feets103 yards = (103 x 3) = 309 feets
square feet (not feets) measure area, metres measure length. They are not comparable.