Southern Expressway crash: Adelaide grandfather killed in horror car pile-up

Tributes have poured in for a beloved grandfather who was killed in a horror multi-vehicle crash which has left loved ones 'shattered'. 

John Iordanis, 58, was driving his green Ford Falcon when the vehicle collided with three other cars and a truck on the Southern Expressway, in Adelaide's south, around 4.50pm on Friday. 

The Christies Beach grandfather died at the scene. He was just 8.5km from home.

Friends and family have been rocked by the death of the much loved father, grandfather and colleague. 

His stepdaughter Natalie Chown told Daily Mail Australia that he was a loving and caring person. 

'We can not express how devastated we are,' she said.  

Ms Chown added on Facebook: 'You have been there through all the ups and downs in life. Our hearts are broken that you were taken so soon'.

Others remembered Mr Iordanis as a kind man who was full of life. 

'Will miss your cheeky smile, our chats and our banter,' one person wrote.   

'One of the best humans I've ever known, always loved a laugh. Shattered to hear the news,' another person wrote. 

Judy Pearson, who had known and worked with Mr Iordanis for 25 years, said that she was still coming to terms with the tragedy. 

'I was so shocked to get the phone call last night,' she wrote. 

'[I] had many laughs with you. You will be missed by so many people at work. Still can't believe it.' 

Police are investigating whether Mr Iordanis had a medical episode before the crash and if it may have been a factor, 7 News reported.  

A South Australia Police spokesman told Daily Mail Australia there was no further updates available as investigations continue. 

The Southern Expressway and Main South Road at Huntfield Heights were closed for several hours before the highway was reopened.  

Mr Iordanis was the 44th person to be killed on South Australian roads this year.

Anyone with information about the crash has been urged to contact police.