What trips people up most is that these rules are not just about how long a truck driver can be behind the wheel; they also limit total on-duty time and require rest breaks and off-duty periods. Hours of service are the work-and-rest limits that apply to many commercial drivers under federal safety rules, mainly 49 C.F.R. Part 395. They are meant to reduce driver fatigue, which can slow reactions, cloud judgment, and turn a heavy rig into a hazard fast.

In practice, hours-of-service records can show whether a driver was legally rested or pushing past the limit to make a delivery. That may include electronic logging device data, fuel receipts, dispatch records, toll records, and loading times. A logbook that looks neat on paper can fall apart once those details are compared side by side.

For an injury claim after a truck crash, a violation can support evidence of negligence, especially if fatigue may have played a role. In Connecticut, commercial carriers and drivers generally follow the Federal Motor Carrier Safety Regulations as adopted by state law, including fatigue-related rules enforced through the Connecticut Department of Motor Vehicles and roadside inspections. That can matter after a wreck on I-95 during a coastal flooding detour in Fairfield County, or when black ice forms on bridges over the Connecticut River and a tired driver has even less margin for error.