For good reason, truck drivers and bus drivers are subject to federal regulation of their hours of service. Driving any motor vehicle requires one’s full attention, and studies have shown that driver fatigue greatly reduces drivers’ reaction times, even to the point of fatigued driving being as dangerous as drunk driving.
That is why the Federal Motor Carrier Safety Administration, or the FMCSA, requires truck and bus drivers to limit their hours of service and take rest breaks in order to avoid fatigue. The FMCSA also requires these drivers to keep accurate logs of their hours of service. However, the hours-of-service regulations for property-carrying drivers and passenger-carrying drivers differ somewhat.
For example, property-carrying drivers have to comply with an 11-hour driving limit, while passenger-carrying drivers have a 10-hour driving limit. Truck drivers are allowed to reach that maximum of 11 hours only after being off duty for 10 consecutive hours, and bus drivers are allowed to reach the 10-hour maximum only after being off duty for eight consecutive hours.