In the testing literature, the term load testing is usually defined as the process of exercising the system under test by feeding it the largest tasks it can operate with. Load testing is sometimes called volume testing, or longevity/endurance testing.
Keep your taste buds awake, drink an energy drink. This may raise your level of alertness for a reasonable amount of driving time. Suck or munch on an apple, orange, or even a lemon to keep taste buds awake. The more tangy the food item the better. (Pull over somewhere safe before eating anything that you can't just pop in your mouth, however.
Pull over to the side of the road. Look for a gap in the traffic that will allow you to pull over, and gradually release the accelerator as you do. Once you reach 20 miles per hour or under, use the brakes if needed, says AAA. Once you're stopped, apply your parking brake and exit the vehicle, advises AAA.