How far in advance must you signal before a turn?

Answer: B — At least 100 feet

Signaling at least 100 feet before making a turn is essential for ensuring safety on the road. This distance gives other road users, including vehicles, cyclists, and pedestrians, sufficient time to anticipate your maneuver and react accordingly. Proper signaling not only enhances communication among drivers but also reduces the likelihood of collisions by providing clear intentions about your movements. It is a critical aspect of defensive driving, allowing others to adjust their speed or position if necessary. While options like 50 feet might seem reasonable, they do not provide enough advance notice for other drivers to make safe decisions. Distances like 200 or 300 feet could be overly cautious without practical necessity in most situations, especially in urban settings. The 100-foot rule balances safety and practicality in various driving conditions.