Final answer:
A driver should signal at least 100 feet before making a turn to alert others of their intention, ensuring safety and legal compliance.
Step-by-step explanation:
A driver making a turn must indicate his/her intention by signaling at least 100 feet before making the turn. This is a basic traffic rule that is designed to promote safety on the roads by giving other drivers and pedestrians ample warning of a driver's intent to turn. Signaling well in advance of a turn is crucial as it affects traffic flow and helps in preventing accidents.
For instance, if a driver intends to turn at an intersection where vehicles often speed through without regard to the posted speed limit, using a turn signal in advance can alert speeders or distracted drivers, potentially avoiding collisions. It also assists pedestrians in understanding vehicle movements, so they can safely navigate the intersection. Moreover, signaling is not just a courteous behavior but a legal requirement in many places.