Final answer:
The correct option is 3. Traffic regulations typically require drivers to signal at least 100 feet before making a turn or lane change to alert other road users and ensure safety.
Step-by-step explanation:
The correct answer is that traffic regulations generally require drivers to signal at least 100 feet before making a turn or lane change. This rule ensures that other drivers and pedestrians are given adequate notice of a vehicle's intentions, which can greatly reduce the risk of accidents.
The purpose of signaling at a distance of 100 feet is to provide a sufficient warning to others on the road, considering the speeds at which vehicles typically travel within city limits, and the distances required for a car traveling at speed to come to a stop. This can be particularly important in situations where pedestrians are present, as a traffic signal would also serve to protect them by managing vehicle flow and providing clear indications of when it is safe to cross the road.