The South Australian Government is seeking to impose hefty jail terms on people who attack public transport staff.

The state is looking at tough new penalties including up to 25 years’ jail to protect workers, after transport unions repeatedly raised concerns about a growing amount of assaults on the Adelaide Metro network.

The Transport Workers Union says 30 per cent of its bus drivers had been assaulted at work.

“For a person to be assaulted in their workplace for just doing their job, it's outrageous,” Transport Workers’ Union state secretary Ray Wyatt has told ABC news.

SA’s Transport Minister Stephen Mullighan says the improvements will include extra security guards and money for a public awareness campaign specifically highlighting dangers for bus, train and tram workers.

“These tougher penalties send a clear message that any act of violence towards public transport workers will not be tolerated,” he said.

Reports say Wilson’s Security staff have been contracted to assist South Australia Police and transport operators.

The public awareness campaign will focus on the harsh new jail terms and other penalties, while also offering rewards of up to $1000 for information that leads to arrest and conviction.

“We need to get the message out that any assault on public transport workers will not be tolerated and anyone caught faces up to 25 years imprisonment,” Mr Mullighan said.