When must a driver signal their intention to change lanes?

A driver is required to signal their intention to change lanes anytime they change lanes. This requirement serves multiple purposes, such as ensuring safety by informing other road users of the driver's intentions and allowing surrounding vehicles to adjust their actions accordingly. By using turn signals, drivers help prevent accidents and promote smoother transitions on the roadway.

It is essential to signal consistently, regardless of the presence of other vehicles or traffic conditions, to communicate with all surrounding road users proactively. This practice enhances overall awareness of movement and intentions, which is critical for maintaining safety on the roads.