Before commercial truck drivers receive the all-clear to hit the road, they need to undergo a Department of Transportation (DOT) physical exam to ensure the driver is medically able to operate a commercial vehicle. This exam must be completed once every two years to ensure all drivers operating commercial vehicles weighing more than 10,000 lbs are medically certified. While a sleep study isn’t always included in the DOT approval process, medical examiners can enforce one if it is suspected that the driver has a sleeping disorder. Let’s take a look at what commercial truck drivers are evaluated on during the...