Final answer:
You should signal at least 100 feet or five seconds before turning to ensure road safety for drivers and pedestrians, especially near intersections and schools.
Step-by-step explanation:
When planning to turn, it is recommended to signal at least 100 feet or approximately five seconds before you actually make the turn. This allows other drivers and pedestrians enough time to anticipate your actions and react accordingly, thereby enhancing safety on the road. For pedestrian safety, this practice is especially important near intersections or school campuses where students and others frequently need to cross. A traffic signal helps to manage the flow of cars and pedestrians, making it safer for individuals to cross.