Final answer:
You should signal at least 100 feet before you plan to turn to inform other road users of your intent to change direction. This distance may need to be increased in areas with higher speed limits or on highways.
Step-by-step explanation:
To let others know you intend to turn, give signals at least 100 feet from the place you plan to turn. It is crucial to signal early enough so that other drivers and pedestrians are aware of your intentions to change direction. Remember, this distance may vary depending on the speed limit of the area you are driving in. In some cases, such as on highways or at high speeds, signaling earlier than 100 feet is advisable for safety.