How far in advance must most states require a driver to signal before changing direction?

Answer: C — 100 feet

Most states require drivers to signal at least 100 feet before changing direction. This distance is established to provide sufficient warning to other roadway users, ensuring they have time to react. Signaling in advance allows other drivers, cyclists, and pedestrians to anticipate the maneuver, enhancing overall road safety and reducing the likelihood of accidents. A signal made at this distance gives drivers behind the vehicle adequate time to adjust their speed or position in response to the intended change in direction. It also helps to communicate the driver's intentions at a safe distance, which is particularly important in areas with higher traffic volume or where visibility may be limited. Understanding this requirement is crucial for promoting safe driving practices and adhering to traffic laws.