Driver Fatigue in Australia: Signs and Rest Breaks

Photo: Mark Thomas, Pexels

Driver fatigue is one of the biggest killers on Australian roads. In NSW it accounts for around 20% of road deaths each year. This guide is for learners, P platers and anyone planning a long drive. It covers the warning signs, microsleeps, why coffee does not fix it, and how to plan rest breaks. The only cure for fatigue is sleep.

Key facts

Being awake for about 17 hours affects your driving like a BAC of 0.05 (NSW, NT, SA, WA). After 24 hours it is like 0.10 (NT, SA).
For learners and P platers on a zero alcohol limit, that means 17 hours awake is like driving well over your legal limit.
A 4 second microsleep at 100 km/h means more than 110 metres with no one in control (NSW, ACT).
The risk of a fatal fatigue crash is four times greater between 10 pm and 6 am (ACT, NT).
Plan a break of about 15 minutes every two hours (ACT, NT, SA).

What are the warning signs of fatigue?

Pull over as soon as you notice any of these (NSW, ACT, NT, VIC):

yawning
sore, tired or heavy eyes, or blurry vision
poor concentration or daydreaming
restlessness, boredom or feeling irritable
slow reactions
making fewer and larger steering corrections
drifting in your lane or across lane lines
missing road signs
your speed creeping up or down without meaning to
not remembering the last few kilometres
trouble keeping your head up

Do not try to push through. NSW warns: do not wait for a microsleep, because by then it is too late.

What is a microsleep?

A microsleep is a brief, unintended loss of consciousness. It happens when you try to stay awake during a boring task like driving. The NSW and ACT handbooks say it can last from a few seconds to a few minutes. Signs include head snapping, nodding, or your eyes closing for more than a couple of seconds.

WA says microsleeps are the main cause of fatigue crashes where the car runs off the road. They are usually the most serious, because the driver does not brake before hitting a tree, another car or the gravel.

What causes driver fatigue?

Cause	What the handbooks say
Not enough sleep	The average person needs about 8 hours, and teenagers need more. Less than that builds a “sleep debt” that only sleep repays (NSW, NT, ACT)
Time of day	Your body clock switches you off between about midnight and 6 am (WA). SA also flags 1 pm to 5 pm as a tired time
Time awake	Risk rises sharply after 17 hours awake (ACT)
Driving straight after waking	“Sleep inertia” lasts 15 to 30 minutes. Wait before driving (NSW, NT)
Long stretches at the wheel	Driving more than 2 hours non-stop (VIC)
Lifestyle	Parties, late-night jobs, study and shift work (VIC, WA)
Medical and medicines	Sleep disorders such as sleep apnoea (SA) and medicines that cause drowsiness (VIC, SA)

Does coffee or opening the window help?

No. The Victorian handbook says coffee and short breaks do not stop fatigue. SA says listening to the radio, drinking coffee and opening the windows are not enough on long trips. If you are tired, pull well off the road and sleep.

NSW recommends a nap of about 20 minutes.

How to plan a long drive

Sleep well the night before. SA says seven to eight hours of uninterrupted sleep.
Do not start a long drive after work or at the end of the day (SA, ACT).
Avoid driving between 10 pm and 6 am, or when you would normally be asleep (VIC, ACT).
Limit your day. SA says aim not to travel more than eight to ten hours a day. The NT says avoid more than 10 hours.
Schedule breaks of 15 to 20 minutes every two hours, even if you do not feel tired (SA, ACT, NT).
Share the driving and ask passengers to tell you if you look tired (SA).
Eat light and drink water. Avoid fatty food, too much coffee and sweet soft drinks. Dehydration causes fatigue (NSW, ACT).
No alcohol before or during the trip.

Where to stop: rest areas and Driver Reviver

Rest areas are open 24 hours a day, every day, and are signposted (NSW, ACT). In the NT they are every 80 to 120 km on major roads.
You must not camp in a NSW rest area. In the NT, unless signposted, you cannot stay longer than 24 hours.
Truck parking bays are for heavy vehicles. Avoid them in a car (NT).
Driver Reviver sites run during peak holiday periods such as Christmas, Easter and long weekends, offering a free cup of tea or coffee and a snack (NSW, ACT).
Petrol stations, parks and country towns are good places to stop too.

Fatigue in the outback

Long distances in high temperatures cause fatigue (NT). Plan fuel, water and rest stops before you leave. See outback and remote driving and country driving in WA.

Fatigue and new drivers

NSW crash data shows P1 drivers are the most likely to crash, and SA says young drivers’ risk is highest late at night, especially on weekend nights and with more than one passenger. Several states limit P1 late-night driving or passengers. See P plate rules compared. WA warns that if you crash because you are not alert, you are likely to be held responsible.

Common questions

How long can you drive before taking a break?

The handbooks recommend a break every two hours. There is no legal limit for car drivers in these handbooks, but SA advises no more than eight to ten hours of driving a day.

Is driving tired as bad as drink driving?

It can be. Being awake for 17 hours affects driving like a BAC of 0.05, and 24 hours like 0.10.

Will an energy drink keep me awake?

The handbooks say caffeine does not fix fatigue and suggest avoiding sweet soft drinks and too much coffee. Only sleep works.

How long should a nap be?

About 20 minutes works best (NSW). Wait until you are fully awake before you drive off.

Can I sleep in my car at a rest area?

A short rest, yes. You cannot camp in NSW rest areas, and in the NT you cannot stay more than 24 hours unless signposted.

Who is to blame if I crash because I was tired?

You are. WA’s handbook says a driver who crashes because they were not alert is likely to be held responsible.

Sources

Transport for NSW, “Road User Handbook” (nsw.gov.au)
Department of Transport and Planning Victoria, “Road to Solo Driving” (transport.vic.gov.au)
Department of Transport and Major Infrastructure WA, “Drive Safe: A handbook for Western Australian road users” (transport.wa.gov.au)
Government of South Australia, “The Driver’s Handbook”, February 2026 (mylicence.sa.gov.au)
Access Canberra, “ACT Road Rules Handbook” (accesscanberra.act.gov.au)
Northern Territory Government, “NT Road Users’ Handbook” (nt.gov.au)

Driver Fatigue in Australia: Warning Signs and Rest Breaks