At what distance should a driver begin to signal a lane change under normal conditions?

A driver should begin to signal a lane change at a distance of 100 feet under normal conditions to ensure both safety and compliance with traffic laws. This distance allows enough time for neighboring drivers to notice the intent to change lanes, which is crucial in preventing collisions and ensuring a smooth transition between lanes. Signaling well in advance enhances the predictability of a driver’s actions, which is important in maintaining traffic flow and ensuring that other drivers can react appropriately.

Choosing 100 feet strikes a balance between providing ample warning to others while also being practical for most driving situations. Signaling too early or too late can lead to confusion or unintended hazards on the road. Additionally, local regulations typically align with this standard, reinforcing the importance of signaling within this distance to promote safer driving practices.