It does have a bearing. The rule in most states is 100 feet. But I recommend you use them at 200 feet if you are traveling at over 50 mph.
You should turn on your turn signal before you need to brake for the turn.
100 feet
When making a turn, signal in advance to indicate your intention to turn. Check for pedestrians in the crosswalk and at the intersection before proceeding with the turn.
So that traffic behind you is able to anticipate your turn, and can act accordingly.
yes, you have to signal your turning actions at least 100 feet.
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.
Approximately 1 block away from the desired turn
When exiting a traffic circle, you should signal your intention to leave by using your turn signal well in advance of your exit. Check your mirrors and blind spots for pedestrians, cyclists, and other vehicles before you move to the exit lane. Maintain a safe speed while navigating the circle, and yield to any traffic already in the circle if necessary. Once you've safely exited, deactivate your turn signal.
To properly use the turn signal on your bicycle, extend your left arm straight out to indicate a left turn, and extend your right arm straight out to indicate a right turn. Remember to make these signals clearly and in advance of your turn to alert other road users.
The speedometer is electric, there is no cable. There is a speed sensor on the transmission that sends a signal to the PCM, which in turn sends a signal to the instrument cluster to display speed.
Motor vehicle laws differ from state to state. Some states do not have a law informing drivers as to how far in advance their turn signals need to be activated. A good rule of thumb is to signal in no less than 100 feet before your turn. This is also a courtesy to other drivers, so they are aware of your next move.
To properly use the bike left turn signal while riding on the road, extend your left arm straight out to the side to indicate your intention to turn left. This signal should be given well in advance of the turn to alert other road users of your intended maneuver.