When is a driver required to use their turn signal?

Answer: C — At least 100 feet before turning or changing lanes

A driver is required to use their turn signal at least 100 feet before turning or changing lanes. This requirement is in place to ensure that other drivers and pedestrians are adequately warned of the driver's intentions. Signaling well in advance allows surrounding traffic enough time to react appropriately, promoting safety on the road. This distance provides a clear indication of the driver's actions, reducing the likelihood of sudden moves that could potentially cause accidents. While some drivers may believe that signaling can be done at any time or only when other vehicles are present, these perceptions do not consider the safety protocols in place for all road users. It’s essential to signal ahead of time as it demarcates the driver's intention to maneuver, allowing for smoother traffic flow and greater overall safety.