In which situation is it helpful to use an adaptive cruise control system (ACC)?

Adaptive Cruise Control (ACC) is especially useful on motorways and expressways because these roads have long, straight sections with consistent traffic flow and higher speeds. ACC helps maintain a safe following distance automatically, reducing driver fatigue and improving safety. On winding roads, the system is less helpful because the constant changes in direction and speed require more active driver control, and ACC may not respond well to frequent braking and steering adjustments. Therefore, ACC is designed to work best on motorways and expressways where driving conditions are more stable.