oil light came on engine began to sound like a diesel oil level fine engine stop

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I had been in bumper to bumper traffic on a freeway. When I got to the exit ramp oil light came on and engine began to sound like a diesel. Pulled over waited approximately 2 hours for engine to cool. Checked and oil level was fine. Started the vehicle and was driving down the road engine just stopped.got it started pulled over to side of road....died..tried to start would start for a few seconds but could never get it to run long enough to move...towed