Emergency providers had been known as to the intersection of Martins Highway and Charlotte Drive, Paralowie, after a motorcyclist reportedly left the highway and crashed right into a pole at about 3.45am.
The 57-year-old man from Salisbury Downs died on the scene.
Police mentioned the rider struck a lamp submit as he left the highway however his bike did not cease there.
"It seems prefer it's in all probability 100, 150, 200 metres down the highway," officer Shane Webster mentioned.
Residents heard the motorcycle travelling alongside the highway moments earlier than the person misplaced management.
"Was woken up by means of the midnight with only a loud sound going previous the home after which ambulance and clearly a police automotive after that I noticed the flashing lights by means of the blind," native Donna Beauchamp mentioned.
Martin's highway was closed in each instructions between McNicoll Highway and Dale Drive for a number of hours as main crash investigators examined the scene.
Investigators are nonetheless piecing collectively the moments main as much as the crash.
Police mentioned the crash marks a grim milestone within the state's highway fatalities this 12 months.
"The person's loss of life is the 56th life misplaced on South Australian roads this 12 months in comparison with 74 on the similar time final 12 months," South Australian police mentioned in an announcement.
"That is the tenth fatality involving a motorcyclist this 12 months."
Locals say an accident on the highway was solely a matter of time and are calling for added security measures.
"It is a 50km highway which does not get used as a 50km highway," Beauchamp mentioned.
"Even some indicators concerning the risks of going so quick but it surely's a raceway."
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