Body signals
Heavy eyelids, frequent yawning, rubbing your eyes, difficulty holding your head up, and repeated blinking are direct signs of sleep pressure.
Driving signals
Lane drift, variable speed, missed signs, late braking, hitting a rumble strip, and forgetting part of the route indicate impaired attention.
Mental bargaining
Telling yourself it is only a few more kilometres, turning the music up, or opening a window does not remove sleep pressure.
The response
Take the next safe opportunity to stop. Rest, change drivers, or arrange alternative transport. If repeated daytime sleepiness is common, seek medical advice.
Sources
Written by the EyeJolt Editorial Team. Published and last reviewed 2026-07-14. Editorial policy.