The agency has also proposed establishing a new safety standard (FMVSS No. 126) to require electronic stability control (ESC) on all light duty passenger vehicles beginning in MY 2009. 8 ESC can prevent a large percentage of loss-of-control crashes which expose vehicles to the off- road tripping mechanisms that cause most rollovers. By reducing exposure to run-off-the-road crashes, an ESC requirement would result in a large reduction in rollover fatalities. The agency has not published any notices with regards to changes to the rollover ratings program to reflect ESC equipped vehicles. .
