The State Government has announced the completion of the installation of permanent anti-throw screens on bridges along the South Expressway.
The Marshall Government announced a $15 million infrastructure solution last year to tackle the long-standing problem of rock throwing along the Southern Expressway.
Infrastructure works included the installation of anti-throw screens, upgrading CCTV cameras and installing mesh over loose rocks along the Southern Expressway.
"Unfortunately, rock throwing along the Southern Expressway has been a long-standing problem over the past decade," said Minister for Transport, Infrastructure and Local Government Stephan Knoll.
"The Marshall Government has invested $15 million to install permanent anti-throw screens, upgrade CCTV and cover loose rocks in the area with mesh to help protect motorists.
"This Government's top priority is the safety of South Australians and these necessary works will go a long way in keeping the residents and motorists in the southern community safe.
"There's still a bit more work to do, with more mesh to be installed in a number of locations, as well as CCTV signage and improving lighting near pedestrian bridges.
"I also want to commend the excellent work SAPOL has done through Operation Watercolour.
"SAPOL's on the ground effort and work with the local community has been a fundamental part of the overall solution.
"In the last seven months we've only seen one confirmed rock throwing incident along the Southern Expressway which led to police swiftly arresting the alleged perpetrator who was later convicted.
"This is an ongoing issue and one we will continue to monitor and work to keep under control."
The officer in charge of the South Australia Police Southern District, Superintendent Yvette Clark, said patrols would continue to monitor the area as a matter of operational police duties, although the number of reports of rock throwing had fallen.
"This type of behaviour is completely unacceptable and poses and terrible risk to motorists," she said.
"The public are urged to continue to be observant and report any suspicious behaviour in the area to police by calling 131 444 in a timely manner.
"These reports have been crucial in assisting police to detect offenders and I thank the community for their contribution to road safety in the area."
