William Van Tassel: Drowsiness while driving is a condition that affects everyone at one time or another. As you become tired, your ability to drive becomes impaired and the risk of a collision rises. Follow these tips to prevent driving while drowsy in the future. Be aware that there maybe no warning before drifting off. One half of drivers who crashed after falling asleep did not experience any signs of drowsiness before the crash. If you experience any of the following warning signs, you should pull over to rest as soon as safely possible, difficulty focusing, yawning repeatedly, and drifting from your lane. There are a couple of easy steps to keep you alert behind the wheel. Get a good night rest, that's between 7 to 9 hours a night. Do a little research before taking off on a long drive and note where you will be making stops to rest. A good rule of thumb is to stop every 100 miles or every 2 hours. If possible, make long trips with a companion. Passengers can remind you to take a break, or have drive in shifts. Remember, resting is by far the most effective way to counter drowsiness. You should be able to drive a reasonable distance without difficulty, if you make regular stops, for fuel, food and rest rooms. Stay awake and alert on the road and stay safe.