Must a driver give a right- or left-turn signal when changing lanes?

A driver must give a right- or left-turn signal when changing lanes as a crucial part of safe driving practices. This requirement serves to communicate the driver's intentions to other road users, helping to prevent accidents and ensuring that all motorists are aware of each other's movements on the road. Signaling before changing lanes allows other drivers to react appropriately, either by adjusting their speed or position, thereby promoting safety for everyone on the roadway.

Failing to signal can lead to confusion and increase the risk of collisions, as other drivers may not anticipate a lane change. This rule applies universally, regardless of location or time of day, reinforcing the importance of consistent signaling behavior across all driving environments.