Final answer:
You must signal at least 100 feet before changing directions while driving to allow other drivers and pedestrians enough time to react, ensuring road safety.
Step-by-step explanation:
When it comes to changing directions while driving, it is crucial to signal well in advance. The exact distance required for signaling before a lane change or turn can vary depending on the state or country's driving laws. Generally, a common rule is to signal at least 100 feet before you change directions. Why is this important? Signaling gives other drivers and pedestrians sufficient warning of your intentions, which allows them time to react and ensures the safety of everyone on the road. Driver reaction time and braking distance are key factors when considering when to signal. These factors help determine how much distance is needed for a car to come to a complete stop or for another driver to understand your maneuver and respond accordingly.