A single vehicle on-road rollover accident of a small van is used to examine the effectiveness of the Anti-Rollover Braking System (ARB). The circumstances of the accident are reviewed, and how the accident was modeled using ADAMS. ARB is then added to the vehicle model to examine what would happen if ARB had been on the vehicle. Two cases are examined. One case uses the same steering as in the accident, and one case uses the same path as the accident. In both of these cases, ARB would have prevented the vehicle from rolling over.