How far in advance must you signal before making a turn?

Answer: B — At least 100 feet

To ensure safety and give adequate notice to other drivers and pedestrians, signaling before making a turn is essential. The requirement to signal at least 100 feet in advance helps others anticipate your movements and react accordingly. This distance is considered sufficient for other drivers to make adjustments, whether it be to slow down, change lanes, or prepare for your turn. By signaling well in advance—specifically, 100 feet—it creates a more predictable driving environment and reduces the risk of accidents. The significance of this distance also relates to various road conditions and speeds. For instance, on a busy road or when traveling at higher speeds, signaling earlier can provide sufficient time for other motorists to recognize your intention. Thus, this standard has been put in place for both safety and effective communication on the road.