 I-70 Speedway was also one of the first tracks to feature a prototypical SAFER barrier; during a World Cup race in the early 1990s, huge styrofoam blocks were placed high along the retaining wall in all four turns.All-Pro Series driver and former NASCAR Rookie of the Year, Jody Ridley hit one of the blocks which sent him airborne over the wall in turn four upside down.Ridley walked away from the wreck, but this style of the barrier was only used in a few more races at I-70.