Police have warned they are cracking down on people involved in near misses with trains in South Australia.

The latest statistics show the number of near misses between trains and pedestrians, cyclists or vehicles doubled in SA last month, from 12 in June to 24 in July.

Chief Inspector Ashley Gordon from the Transport Services Branch told 7News: “The message is simple – keep off the tracks, you don’t get a second chance.”

“This is really traumatic for the people who are on the train, it’s traumatic for the drivers, most of all it is traumatic for friends, family and loved ones of those who die.”

Police say they have boosted safety patrols for Rail Safety Week, and anyone caught getting too close with be slapped with a $220 fine.