Class 4 Practice Results - Restart New Quiz Restart New Quiz #1. Why are hours of service regulations in place? To comply with the terms of labor contracts To comply with the terms of labor contracts To reduce companies' labor costs To reduce companies' labor costs To attract more drivers To attract more drivers To reduce driver fatigue To reduce driver fatigue Hours of service regulations are designed to limit the time you can spend driving. Statistics show that a fatigued driver is more likely to become involved in a crash. Next