A future state Liberal government would conduct an audit of major public spaces in Adelaide to look at ways to improve security and reduce the risk of a terror attack.
Opposition Leader Steven Marshall released the anti-terrorism policy on Sunday with police to be charged with making checks and, if necessary, coming up with recommendations for safety improvements should the Liberals win the next election in March.
"It is our responsibility to ensure that South Australians and our way of life are afforded every protection from the threat of terrorism," Mr Marshall said.
"South Australians have the right to go about their daily lives and enjoy sporting events, concerts and festivals knowing that measures are in place to protect them from despicable acts of terrorism."
Mr Marshall said the audit would include such areas as Rundle Mall, Adelaide Oval, Jetty Road in Glenelg, Henley Square, the Adelaide Entertainment Centre and the Hindmarsh soccer stadium.
"We will ensure all these venues and locations are audited and measures are put in place so we are as prepared as possible for a terrorist attack," he said.
"The recent attacks in Paris, Manchester and obviously Barcelona less than two weeks ago have demonstrated how vulnerable cities can be to heinous acts of terrorism.
"Terrorists are becoming increasingly more desperate and brutal with their attacks, using vehicles to drive through crowds of people."
Mr Marshall said SA and Adelaide were not immune from the threat of a possible terror attack.
"We want to act now and take preemptive steps to prevent a terrorist attack in South Australia and not wait to have this conversation until after a disaster," he said.