Which of the following distances requires a vehicle to signal before turning?

A vehicle must signal its intention to turn at least 100 feet before making the turn to ensure that other drivers and pedestrians are aware of the maneuver. Signaling in advance is crucial for safety as it allows other road users ample time to react and make informed decisions. When a driver indicates a turn well in advance, it helps maintain a safe flow of traffic and minimizes the risk of collisions, particularly in busy areas where other vehicles and pedestrians may be present.

While signaling is important in all situations, the specific requirement to signal 100 feet ahead is a standard rule that promotes safe driving practices and communication on the road. This distance provides a balance between being considerate of other road users and ensuring the driver has enough time to execute the turn. Other options are shorter distances that may not provide adequate warning to those around the vehicle.