Easiest way to remember when to stop and not violate the 10 hr clock is to subtract whatever time it shows from midnight your time .. Aka clock shows 01:30 you know you have to shut down by 10:30 even if you have shift or drive time left .. sometimes grabbing a few 20 minute breaks will mess up your clocks .. it’s better to sit for 30 minutes or more if you need to run full hours..