This document provides an overview of the hours-of-service regulations that commercial drivers must follow to limit fatigue and ensure safety. It discusses the three main limits: 11-hour daily driving limit, 14-hour "driving window" limit, and 60/70-hour weekly limits. It also covers requirements for breaks, off-duty time, sleeper berth rules, and exceptions. The goal of the regulations is to keep fatigued drivers safely off the roadways.