Australia's Roads: What Causes Crashes?

what causes car crashes in australia

Road crashes are a leading cause of death and injury in Australia, with thousands of Australians hurt or killed in road accidents each year. In 2022, there were 1,192 road fatalities in Australia, a 5.6% increase from 2021. The states that experienced the most road deaths in the 12 months ending in June 2025 were New South Wales, with 362 deaths, and Queensland, with 296 deaths. So what are the main causes of car crashes in Australia? Speeding, drunk driving, driver fatigue, distracted driving, and not wearing a seatbelt are the top five risk factors contributing to road fatalities.

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Speeding

In 2023, speeding was a factor in 29% of all traffic fatalities in Australia, resulting in 11,775 deaths or an average of over 32 people per day. Speeding is particularly dangerous for young drivers, with one-third of all drivers and riders in fatal speeding-related accidents being males aged 17 to 25. In fact, speeding kills more young drivers than any other reckless behaviour on the road. The risk of speeding is further compounded when coupled with alcohol impairment, with 41% or more of speeding drivers in the 21 to 54 age group being alcohol-impaired.

While some drivers may feel that speeding is acceptable, particularly when driving slightly over the limit, it significantly increases the risk of accidents and the severity of their outcomes. Reducing speed can have a substantial impact on road safety. For example, lowering speed by 5 km/h can lead to at least a 15% decrease in crashes and lessen the severity of injuries.

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Distracted driving

Manual distractions cause drivers to take one or both hands off the wheel to manipulate an object not directly related to driving, such as eating, drinking, or smoking. Visual distractions cause drivers to look away from the road or their instruments, such as reading directions or looking at something on the roadside. Cognitive distractions include anything that takes the driver's mind off the task of driving, such as talking to passengers or listening to the radio.

The use of mobile phones while driving is a significant form of distraction. Despite knowing the dangers of texting while driving, many drivers still engage in this behaviour. In 2016, the Road Safety Commission reported that 26 fatalities resulted from inattention, double the previous five-year average. To combat this issue, the Queensland Government introduced tough penalties for drivers caught using their phones, including fines of $1000 and increased demerit points.

Other factors that can contribute to driver distraction include having passengers in the car, roadside advertising, and the use of in-vehicle technology. The National Transport Commission (NTC) is currently reviewing how Australian Road Rules address driver distraction, aiming to develop solutions that better address this issue.

To minimise the risks of distracted driving, it is recommended that drivers turn off their mobile phones when getting behind the wheel and focus their full attention on the road to ensure their safety and that of other road users.

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Drunk driving

The consequences of drunk driving can be devastating, and the impact on the lives of those involved can be far-reaching. Alcohol is a potent depressant that slows down the body's central nervous system, affecting both physical and mental functioning. This can lead to slower reaction times, impaired judgement, and blurred vision, all of which can be deadly when behind the wheel. Even a small amount of alcohol in excess of the legal Blood Alcohol Concentration (BAC) limit of 0.05 can double the risk of a crash. In Queensland, novice drivers and professional drivers are required to maintain a zero BAC level.

The impact of drunk driving is not limited to the driver but also extends to passengers and other road users. In Australia, over one in four drivers and riders killed on the roads have a BAC exceeding the legal limit. This statistic highlights the deadly nature of drunk driving, not just for the drunk driver, but for all those sharing the road with them. The risk of a fatality on the road doubles with each 5km/h increase above 60km/h, and when alcohol is involved, the likelihood of a crash increases sharply.

Despite police intensifying their efforts to combat drunk driving, with over 15 million random breath tests conducted across Australia in 2019, the problem persists. Recent operations, such as the Australia Day operation in 2024, have revealed concerning trends, with 244 drunk drivers caught in New South Wales alone. The persistence of drunk driving as a leading cause of crashes highlights the need for stricter penalties, ongoing awareness campaigns, and a collective mindset shift towards zero tolerance for this dangerous behaviour.

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Driver fatigue

Fatigue is a state of mental and physical exhaustion that reduces alertness and performance. It can cause drivers to become sleepy, which is extremely dangerous behind the wheel. Drivers who fall asleep cannot react to hazards or brake in time to avoid a collision. Research shows that being awake for 17 hours has a similar effect on driving ability as having a blood alcohol concentration of 0.05. The risk of a fatigue-related crash is also four times higher at night and in the early morning, when the body naturally craves sleep.

Long working hours and shift work are significant contributors to driver fatigue. Truck drivers, in particular, are prone to fatigue due to their long working hours and extended periods of driving. An Australian study found that trip-based payments, which incentivise longer distances and reduced rest time, also play a role in fatigued driving. Lifestyle factors, such as diet, alcohol consumption, and physical activity, may also influence fatigue levels, but these areas require further research.

To combat driver fatigue, it is essential to prioritise sleep and rest. Drivers should ensure they are well-rested before getting behind the wheel and take regular breaks during long journeys. Waiting at least 30 minutes after waking up before driving can help reduce the risk of 'sleep inertia', a temporary state of impaired alertness that can last up to 30 minutes after waking. Taking short naps of around 20 minutes can also help combat fatigue, but it is important to recognise the early warning signs, such as yawning, heavy eyelids, and difficulty concentrating, and pull over to a safe location before reaching the point of microsleeps.

Other strategies to mitigate driver fatigue include improving vehicle technologies, such as implementing lane assist systems and fatigue detection, and real-time monitoring of long-distance drivers. The Australian government is actively addressing this issue through initiatives like the National Road Safety Partnership Program and co-funding research projects aimed at developing evidence-based interventions for the heavy vehicle industry.

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Poor road conditions

One of the main challenges posed by poor road conditions is reduced visibility. High winds can blow dust over the road, while heavy rains, fog, or sun glare can obscure drivers' vision. In such conditions, drivers may need to slow down or wait for visibility to improve before continuing their journey. Poor visibility can make it difficult to see other vehicles' movements, increasing the risk of collisions.

Potholes, uneven road surfaces, inadequate signage, and unmarked construction zones are other examples of poor road conditions that can catch drivers off guard. These issues can lead to a loss of vehicle control and unexpected accidents. It is crucial for drivers to remain vigilant and exercise caution when navigating areas known for poor road conditions.

Additionally, animal crossings on rural roads are a common cause of car accidents in Australia. Animals, especially kangaroos, can suddenly cross paths with vehicles. Colliding with larger animals can cause significant damage to vehicles, and swerving to avoid them can result in losing control and veering into oncoming traffic.

To address poor road conditions, government and local councils must prioritize road maintenance and safety. Regular inspections and timely repairs can help ensure that roads are safe for drivers. Drivers also play a crucial role in road safety by adhering to maintenance schedules, heeding recalls and safety warnings, and adjusting their driving behaviour according to road and weather conditions.

Frequently asked questions

The National Road Safety Partnership Program (NRSPP) has identified the "Fatal Five" major risk factors contributing to road fatalities: speeding, intoxication (including drugs and alcohol), not wearing a seatbelt, driver fatigue, and distraction.

In 2025, the states that experienced the most road deaths were New South Wales, with 362, and Queensland, with 296. The Australian Capital Territory had the lowest number of deaths, with 8.

Speeding reduces the available time to respond to unexpected hazards and increases the severity of crashes. The impact force during a high-speed collision is significantly greater. According to the Victorian Government's Transport Accident Commission (TAC), the risk of a fatality doubles with each 5 km/h increase above 60 km/h.

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