That depends on the country in which you live. Some countries drive on the left, others drive on the right and this will affect which side you pass another vehicle.
Tap your brakes lightly to warn the vehicle
To show what would have happened under normal circumstances
True
approaching an incline
You should take the policy out in the state the vehicle 'resides' in.
You should always remain a safe distance when you are behind another vehicle. The recommended amount of space that you should leave is one and half car lengths.
Under normal circumstances, it certainly should not explode. If you used a counterfeit battery though, then who knows.
never
Under normal circumstances, no (the court can order it under specific circumstances). But every state should require it.
twice the normal space
Both.
The overdive should be on under normal circumstances unless you are towing, carrying a heavy cargo, or are in an a mountainous area.