Uneven road surfaces along Horrocks Highway, near Roseworthy, will be addressed with resurfacing works starting this week.
The South Australian Government has committed $500,000 to resurface various sections of undulating road along Horrocks Highway, between Kangaroo Flat Road and Ashwell Road.
"This is just the beginning of the State and Federal Government's $55 million total investment to fix Horrocks Highway, and follows the $2.5m works which were undertaken late last year," Minister for Transport, Infrastructure and Local Government Stephan Knoll said.
"This scope of works will make this 'horror highway' safer for motorists, and also improve freight productivity for South Australia."
The Horrocks Highway is 91 kilometres in length from Gawler to Clare, and carries up to 6300 vehicles each day.
"I know just how important fixing this road is and it has been a priority for our governments, both state and federal, to secure these important works," Mr Knoll said.
"The Marshall Liberal Government is committed to delivering for regional South Australia.
"Now, with a re-elected Federal Coalition Government we can get on with the job of fixing this important regional road and ensuring the safety and productivity of our regions."
The works near Roseworthy will be undertaken each night from 6pm until 7am, from today (Monday, May 20) until Sunday, May 26, weather permitting.
Line marking will then be undertaken shortly after the asphalting is completed.
Lane closures and speed restrictions will be in place during the works.
Road users are advised to observe signage and follow the direction of traffic management staff.