A signal of intention to turn right or left should be given continuously during the last how many feet traveled before turning?

The correct answer emphasizes that drivers should signal their intention to turn continuously for a distance of 100 feet before making the turn. This requirement allows other drivers and pedestrians to anticipate the driver's actions, enhancing safety by reducing the likelihood of collisions.

By providing a signal well in advance, a driver ensures that others on the road are aware of their upcoming maneuver, which is crucial in busy or high-traffic scenarios. Signaling at the appropriate distance contributes to better overall traffic flow and helps maintain predictable driving behavior, which is essential for road safety.

Other options suggest shorter signaling distances, which may not sufficiently communicate the driver's intent, especially in environments where speed and traffic density vary significantly. Thus, 100 feet is a well-established standard that balances safety and practicality when signaling for turns.