10 feet.
300 feet.
100 ft
You should turn on your turn signal before you need to brake for the turn.
100ft
100 yards
Approximately 1 block away from the desired turn
In New Jersey, you should signal your intention to turn at least 100 feet before making the turn. This gives other drivers adequate notice of your actions. Additionally, it's important to use your turn signal continuously until you complete the turn to ensure clear communication with other road users.
the same as vehicles, about the length of two houses from where you are turning
You should use your turn signal in far enough advance so the car behind you knows you are going to turn and has enough time to slow down. However, putting the turn signal on too far in advance can be confusing because the following car will not know exactly when you are going to turn.
I haven't read a driver's manual for years, but yes, as far as I know drivers in Indiana are required to signal before turning.
As far in advance as possible with respect to the photographer and his or her personal wishes on how far in advance they would like to be notified.
at least 100 ft.