Both.
A vehicle approaching from the opposite direction.
Within 500 feet of oncoming traffic.
in florida you must dim your headlights from the oncoming traffic at 500 feet. and from the rear at 300 feet.
It is safe to pass only when you are not entering the bridge and there is no oncoming traffic. It you do not have enough time to pass before a bridge wait until after you have crossed the bridge to pass.
As soon as you see a car directly in line towards you, you should go to low beam.
approaching an incline
Those laws vary from place to place. Common courtesy dictates to dim your lights well before they reach the oncoming vehicle.
false
If you can see the oncoming vehicle then he can see you. Dim your lights at that time.
The vehicle exiting the parking space that did not yield to oncoming traffic.
It depends on where you live. But the rule of thumb I was taught is that if you can see another driver's car in front of you, you should dim your headlights. That usually means to keep your brights off whenever you can see oncoming traffic or whenever you are behind another car that you can see.
1999,2000,2001