As defined by page 45 of the New South Wales Road Users' Handbook, the early warning signs of fatigue are:
- Poor concentration.
- Tired or sore eyes.
- Slow reactions.
- Feeling irritable.
- Making fewer and larger steering corrections.
- Missing road signs.
- Having difficulty staying in the lane.
I'd add heat. A lot of people I talk to claim to feel cold when fatigued; for some reason I feel as though I'm burning up. I also feel overconfident in my joke telling abilities.
And something I didn't know:
During peak holiday travel periods, such as Christmas, Easter and holiday long weekends, almost 100 Community Driver Reviver sites operate throughout NSW. These are places to take a break during a long journey and have a free cup of tea or coffee and a snack. Local volunteers are on hand to offer advice about road conditions.
That's really cool.