POLICE seized 87 cars and charged 115 drink-drivers over the October long weekend and officers expect to impound 8000 vehicles this year.
The number of positive blood-alcohol readings and excessive speed detections in the north of the state has angered police.
Traffic Support Branch Superintendent Linda Fellows said police were targeting dangerous driving with a concentration of officers in "high-risk" spots during Operation Safe October.
"We've conducted a number of drink-driving operations over previous long weekends and, unfortunately, we seem to get this consistent (number) of people detected for drink-driving," she said.
"People need to be aware and not disregard it as `it won't happen to me' because you will get tested and you will get caught."
Supt Fellows said she was particularly disappointed at three drivers who allegedly exceeded the speed limit by more than 45km/h near Port Germein, in the state's north, on Monday.
Officers say they clocked a Chinese international student, 29, driving at 159km/h in 110km/h zone on the Augusta Highway at about 8.40am.
At about 3.30pm a Port Augusta woman, 32, registered 158km/h in a 110km/h zone on Augusta Highway.
They each lost their licences immediately for six months.
About 4.45pm, police say they detected a Parafield Gardens woman, aged 18, on P-plates driving at 145km/h in a 100km/h zone on Augusta Highway, south of Port Germein.
She also lost her licence for six months and was issued an expiation notice for speed and breaching a condition of her P licence.
"It's just straight-out dangerous driving," Supt Fellows said. "Alcohol, taking drugs, speeding, not wearing seatbelts, those are the things again and again that feature in fatal crashes.
"It's dangerous - people know about it and people have to make the right choices."
Statistics from last year showed 64 per cent of fatalities occurred on rural roads and speed or dangerous driving contributed to five of the 12 fatal crashes in October last year.
REF: http://www.news.com.au/police-seize-87- ... 6158204346
