When must a driver signal their intent to change lanes?

A driver must signal their intent to change lanes at least 30 meters (100 feet) before making the maneuver to ensure that other road users are aware of their intentions. This advance notice is crucial for maintaining safety on the road, as it gives other drivers enough time to react appropriately, either by maintaining their speed or changing lanes themselves, if necessary. Effective signaling is a key component of defensive driving, as it helps to prevent collisions and misunderstandings between drivers.

The requirement to signal well in advance also aligns with road safety regulations aimed at promoting clear communication between drivers. This practice enhances road predictability and supports smoother traffic flow. By signaling early, a driver shows consideration for the safety of others, which is essential for responsible driving behavior.