Recently the National Highway Traffic Safety Administration (NHTSA) established the Federal Motor Vehicle Safety Standard (FMVSS) No. 126 requiring all new passenger vehicles under 10,000 lbs GVWR include an electronic stability control (ESC) system as standard equipment. FMVSS No. 126 tests new vehicle ESC systems through a series of evasive lane-change maneuvers at highway speeds to ensure the driver can maintain control in critical driving situations. The idea behind the mandate is to reduce the risk of rollover crashes among passenger vehicles. Effective August 2012 this law requires aftermarket products to be compliant with these same standards.