CDL: Fitness and Driving
Staying Alert and Fit to Drive
Driving a commercial vehicle for hours at a stretch wears anyone down, even experienced drivers. This article covers how to prepare for long trips, what to do while you're behind the wheel to stay sharp, and what to do the moment drowsiness actually sets in.
Preparing Yourself Before You Drive
Prioritize Sleep
Sleep doesn't work like a bank account you can pre-fund. You can't stockpile it ahead of time, and you can't borrow against it — but just like money, you can fall into debt with it. Every hour of missed sleep becomes a debt owed to your body, and the only way to settle that debt is by actually sleeping. Willpower won't erase it, and it won't fade away on its own. Most people need seven to eight hours of sleep every 24 hours. Starting a long trip while already worn out is dangerous, so if a lengthy drive is on your schedule, make sure you're well-rested before you leave.
Schedule Trips With Your Body Clock in Mind
Try to plan your schedule so you're not carrying sleep debt into a long trip. Your body naturally adjusts to sleeping during certain hours, and driving during those hours leaves you less alert than usual. Where possible, arrange trips around the hours you're normally awake. A large share of serious commercial vehicle crashes happen between midnight and 6 a.m., a window when tired drivers are especially prone to falling asleep — particularly if they don't usually drive at that time. Pushing through to finish a long haul during these hours can be especially risky.
Make Exercise a Habit
Regular physical activity helps you resist fatigue and sleep more soundly. Try to build some exercise into your daily routine — instead of parking yourself in front of the TV in your sleeper cab, take a walk or jog a few laps around the lot. Even a small amount of daily activity can give you more energy throughout the day.
Eat Well
Finding healthy food on the road takes some extra effort, but it's doable. Look for restaurants offering balanced meals, and if fast food is your only option, choose lower-fat items. Cutting back on fattening snacks — swapping them for fruit or vegetables — is another simple way to reduce how many empty calories you're taking in.
Be Cautious With Medication
Plenty of common medications can make you drowsy, and those that do carry a warning label about operating vehicles or machinery. Even an ordinary cold pill falls into this category. If you're driving while sick, you're better off putting up with the cold itself than dealing with the side effects of medicine that could impair you.
Keep Up With Medical Checkups
Routine visits to your doctor can genuinely save your life. Conditions like diabetes, heart disease, and skin or colon cancer are far easier to treat when caught early. If you regularly deal with daytime sleepiness, trouble sleeping at night, frequent naps, falling asleep unexpectedly, loud snoring, or gasping and choking during sleep — or if you wake up still feeling exhausted — it's worth talking to your doctor or a sleep disorder specialist.
Staying Sharp While You're Driving
Keep the Cab Cool
A hot, stuffy cab can make you sleepy fast. Crack a window or vent, or run the air conditioner if your vehicle has one.
Take Breaks Before You Need Them
Short breaks can do a lot to keep you alert — but the trick is taking them before you start feeling seriously drowsy, not after. Stop regularly, walk around, and give your vehicle a quick once-over. Some light physical activity can help too. Plan for a mid-afternoon break, and aim to get your sleep in during the midnight-to-6-a.m. window whenever your schedule allows.
Recognize the Warning Signs
Sleep isn't something you choose — if you're drowsy enough, you can drift off without ever realizing it happened. Drowsy drivers often experience "micro sleeps," brief lapses of around four or five seconds that feel like nothing at the time. At 55 miles per hour, that's more than 100 yards of driving with essentially no one at the wheel — plenty of distance for a crash to happen. Even if you don't feel drowsy, carrying sleep debt still puts you at risk. Watch for these warning signs that sleep may be creeping up on you:
- Your eyes close or lose focus on their own
- You're struggling to keep your head up
- You can't stop yawning
- Your thoughts start to wander or feel disconnected
- You don't remember driving the last several miles
- You're drifting between lanes, tailgating, or missing road signs
- You keep having to jerk the vehicle back into your lane
- You've drifted off the road and narrowly avoided a crash
Even a single one of these signs is a real warning that you could fall asleep without meaning to. Pull off the road somewhere safe and take a nap.
When Sleepiness Actually Hits
Trying to push through drowsiness is far riskier than most drivers assume — it's a leading cause of fatal crashes. Keep these guidelines in mind when it happens to you.
Stop and Sleep
When your body genuinely needs sleep, nothing else will substitute for it. If you were planning to stop anyway, do it the moment you notice the first signs of drowsiness — even if that's earlier than you'd planned. Waking up a little earlier the next day lets you stay on schedule without risking a trip while you're not fully alert.
Take a Nap If You Can't Stop for the Night
If stopping completely isn't an option, pull off somewhere safe — a rest area or truck stop — and take a nap. Even a nap as brief as half an hour does more to combat fatigue than a half-hour spent drinking coffee.
Skip the Drugs
No drug can actually reverse fatigue. Stimulants might keep you awake for a while, but they won't restore your alertness, and eventually you'll be even more exhausted than if you'd never taken anything at all. Sleep is the only real remedy for fatigue.
Skip the Shortcuts
Don't count on coffee, caffeine, an open window, the radio, or any other trick to keep you awake. None of these substitute for actual rest.
Illness on the Road
Every so often, you may become too ill to operate your vehicle safely. If that happens, you shouldn't drive — though in a genuine emergency, you may drive to the nearest location where you can safely stop.
Staying alert behind the wheel isn't about willpower in the moment — it's about the choices you make before and during a trip. Getting enough sleep, scheduling around your body's natural rhythms, taking breaks early, and recognizing the warning signs before they become an emergency are what keep both you and everyone else on the road safe.