In Georgia, the law on turn signals during a lane change is more nuanced than many drivers know. Under O.C.G.A. § 40-6-123, signaling is not automatically required every time a driver changes lane. Instead, the duty to signal arises only when another vehicle “may be affected by such movement.”

The statute itself reflects a practical, safety-based approach. First, it provides that no driver may move right or left on a roadway unless the movement can be made with reasonable safety. Second, it requires a signal only when another vehicle may be affected by that movement. That distinction matters. The law is not written to punish every lane change without a signal instead; it is designed to protect other motorists whose driving could be influenced by that vehicle’s lane change.

Many people believe Georgia law always requires a signal for 100 feet before any lane change. While O.C.G.A. § 40-6-123(b) contains a 100-foot signaling requirement for turns, Georgia courts have historically treated lane changes differently, focusing on whether another vehicle could actually be affected.

So, when is a signal legally required? A driver should use a turn signal when a lane change could influence nearby traffic, for example when there is a trailing vehicle in the same lane, any nearby motorist who may need to react by slowing down, changing position.

By contrast, where the road is empty and no other vehicle could be affected, Georgia appellate decisions make clear that failure to signal may not amount to a violation at all.

That principle has real constitutional significance. Officers often cite “failure to signal” as the basis for a traffic stop. But if dash camera footage or other evidence shows there was no surrounding traffic to be affected, the stop may lack the reasonable articulable suspicion required by the Fourth Amendment.

Signaling is always smart. But in Georgia, the legal question is not simply whether a driver moved. It is whether anyone else was there to be affected.