But how important is it that they are well rested?
That's the question being asked across the country after a fatal accident involving a truck driver.
Following a fatal accident in New Jersey involving a truck driver who was allegedly awake for 24 hours, truck drivers and a local doctor speak out about the importance of sleep.
Hundreds of truck drivers pass through Erie daily on Interstate 79 and 90, which can be dangerous if they don't have enough sleep.
Federal law mandates that truck drivers have 14 hour shifts, but they're only able to drive for 11 of those fourteen hours.
Dr. Jeffrey McGovern says the average adult needs seven to nine hours of sleep every night to be well rested.
If someone doesn't get that many hours, it negatively impacts health including diabetes, sleep apnea and heart disease.
If you don't get those recommended seven to nine hours, Dr. McGovern says it is ok to take short 15 to 20 minute naps.
Copyright 2016 Nexstar Broadcasting, Inc. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.