Three men have died in separate fatal crashes in South Australia overnight.
Emergency crews were called to Railway Terrace, Osborne, in Adelaide's north-west, just after 2:30am after a motorcycle carrying two people crashed near Midlunga railway station.
A 19-year-old Lower Mitcham man who was riding the motorcycle died at the scene, while his passenger, a 16-year-old Taperoo boy, received life-threatening injuries and was taken to the Royal Adelaide Hospital.
The second fatal crash was at Western Flat, about 10 kilometres south of Bordertown, in the state's south east.
Just before midnight, police and emergency services responded to reports of a car rollover on Stott Road.
The driver, a 20-year-old Bordertown man, died at the scene.
On Sunday morning, police and emergency services also responded to a serious crash on Gawler–One Tree Hill Road, at Yattalunga, north-east of Adelaide, where a car crashed into a tree.
The driver and sole occupant, a 42-year-old Williamstown man, died at the scene.
Gawler–One Tree Hill Road was closed between Uley Road and Humbug Scrub Road.
The crashes brought the state's road toll to 39, the same as the same time last year.
Inspector Campbell Hill said four families were now "in the midst of a personal crisis".
"One overnight is a tragedy and bad enough, three overnight is a significant impact," he said.
"It's devastating for the families involved, but for police as well it's an incredibly difficult thing to deal with.
"It takes us back to that challenge of imploring people to take care on the roads."
Speed camera review launched
Meanwhile, the State Government says it will remove fixed speed cameras that are found by a review to be in places that do not improve safety.
An independent audit into the locations of speed cameras will commence tomorrow, investigating allegations of revenue raising in camera placement.
The Government will delay the installation of the next 10 safety cameras while the review takes place.
Police Minister Corey Wingard said anyone could submit feedback.
"If there are cameras out there that are not there for road safety purposes and that comes back from the review, we'll definitely look at removing cameras, replacing cameras, relocating cameras," he said.
"It gives people a chance, and I've been contacted a lot by people that say we want a speed camera in our local communities."
So far this financial year, the two top fixed speed cameras — both on the South Eastern Freeway — have brought in $4.6 million in revenue.
