A police operation targeting South Australian drivers using mobile phones and not wearing seatbelts has led to more than 5000 fines being issued in the past two months.
About 3500 drivers have been fined for using their phones or other devices and 1500 were caught not wearing a seat belt.
In a recent crackdown at the Gepps Cross intersection, 51 were issued with expiation notices for using phones or electronic tablets over a two-hour period.
The worst areas for drivers using mobile phones were in Adelaide's eastern suburbs, Sturt and Holden Hill.
Superintendent Bob Fauser from the Traffic Operations Unit says the increase in the use of hand-held technology is leading to more road crashes.
He says in one recent case, a young driver was captured on film behind the wheel texting while her friend steered the vehicle.
"Police will continue to give attention to these offences but we know that we can not do it alone. We need all South Australian motorists to recognise the risks that they pose to others and themselves when they continue to commit these offences," he said.
"I know many companies are already taking action and are giving direction to their employees not to engage in any conversations while in company cars and I think that's something that many company's could consider and reduce the risk to our motorists.
"We ask all South Australian motorists to step up and take responsibility for their own actions."
Over the past five years, an average of 73 road deaths have occurred each year because of driver distraction or people not wearing seatbelts.
Police say country drivers were prominent among those fined for driving without seatbelts, with more than 150 in the Far North, Eyre and Western, and Yorke and Mid North zones.
The warning comes three days after four people died in two separate crashes, prompting an urgent plea from police for changes to the road safety culture in the state.
Three people died when a car crashed into a tree near Penong, west of Ceduna, and a woman was killed after being hit by a car on the South Eastern Freeway while chasing her dog which had jumped from her vehicle.
Superintendent Fauser said one of the passengers killed in the Penong crash was not wearing a seat belt.
"There are clearly a number of factors that people need to understand and which we constantly remind motorists of and they are not speeding, wearing a seat belt - one of the people who have died in these last two days was not wearing a seat belt - to not be distracted, to not subject yourself to fatigue, to not drink or take drugs and drive," he said.