Factors affecting road safety
Factors affecting road safety are driver behaviour, road condition, driving conditions, and the condition of vehicles. The top five causes of Australian road fatalities are speeding, distractions, driving under the influence of alcohol or drugs, fatigue, and failure to wear a seatbelt.
Driver behaviour is by far the most influential factor, according to international research, accounting for 61% of road accidents. Environment and infrastructure factors account for 31%, while vehicle factors account for 9%.
Dangerous driving behaviour is the biggest contributor to road trauma, followed closely by distracted, tired and drunk driving. For example, each year speeding contributes to around 41% of road fatalities and 24% of serious injuries in NSW.
As speed exceeds 30 km/h, risks of fatality for vulnerable road users increase almost exponentially. High speeds also closely correlate with risks of injury in crashes involving two or more vehicles.
Meanwhile, drink-driving causes approximately 30% of fatal crashes in Australia, with more than 1 in 4 drivers and passengers killed showing a Blood Alcohol Content over the legal limit.
The condition of roads also has a significant impact on road trauma, particularly in regional Australia.
In March 2022, a study from the Bureau of Infrastructure, Transport and Regional Economics found that the poor quality of roads in regional areas – such as poor design, repair flaws, inadequate safety treatments and insufficient infrastructure for vulnerable road users – is directly linked to the rising road fatalities in rural and remote locations.
When it comes to the condition of the vehicle, older vehicles are associated with an increased likelihood of an injury or fatality. Vehicles aged 15 years or older are disproportionately represented in fatal crash statistics and are four times more likely to be involved in a fatal crash than vehicles aged zero to five years.
All this being said, it needs to be stressed that the achievement of a safe road system, in which there are zero fatalities or serious injuries, is not the responsibility of road users, rather it is of the authorities responsible for funding, creating, and operating the transport network. In The Ultimate Safe System: Redefining the Safe System Approach for Road Safety (2022), it’s laid out like this:
In road transport, the Ultimate Safe System is one in which road users cannot be killed or seriously injured regardless of their behaviour or the behaviour of other road users.
Achieving no one being killed or seriously injured requires a system in which no one can be killed or seriously injured, regardless of the errors they make. Otherwise, the system relies on road users explicitly acknowledged as fallible to not ever make various mistakes. Only with this rigorous definition is the system consistent with the fundamental meaning of a safe system and the moral imperative to deliver zero road deaths and serious injuries identified under the Safe System approach.
Associated developments, and attendant benefits additional to road safety, include “more pedestrian areas with no vehicular traffic, the provision of more public transport, or improved urban and land use planning in order to address safety issues, thus making our cities more livable and less polluted and generating fewer climate change impacts.”