A jump in road deaths in South Australia, with the toll running at a near 10-year high, has prompted calls for motorists to take more care on the state's roads.
In the first six months of 2021, 53 people have died, seven more than at the same time last year.
It's the second-worst start to the year in the past decade and equal to the 53 people killed in the first half of 2013.
If the situation continues SA would record more than 100 deaths over the full year.
Royal Automobile Association Senior Safety Manager Charles Mountain said the mid-year report was a sombre reminder for people to take extra care on the roads.
"All road users can play their part by being safe and not contributing to the number of lives lost in road crashes," he said.
"Whether you are on Adelaide's streets, enjoying a driving holiday this school break or are a regular user of regional roads, it's crucial not to be complacent or distracted when behind the wheel.
"Also be aware of other drivers' behaviour, as their focus may not be where it should be."
Police figures showed almost half the fatal crashes this year involved single vehicles running off the road.
The number of people losing their lives on regional roads was also running higher than the average, accounting for 66 per cent of deaths.
While 23 people killed so far this year were aged 50 to 69, compared to just nine in the same period last year.
Mr Mountain urged motorists to drive to the conditions, especially during the winter months.
"These include heavy rain, fog, slippery roads and some areas may even experience black ice," he said.
"These conditions can dramatically affect how your vehicle behaves, particularly if you don't adjust your driving by slowing down, reducing cornering speed and allowing a greater stopping distance.
"Safely negotiating such conditions requires our full attention."