us department of transportation national highway traffic safety administration preliminary regulatory impact analysis proposed fmvss no 126 electronic stability control systems office and evaluation center for statistics august 2006 people saving table contents executive summary e 1 i introduction ii requirements a definition esc 2 b functional 3 c performance 4 oversteering test maneuver 5 lateral criteria 7 responsiveness 8 d malfunction telltale symbol 10 off switch 11 iii how works prevents loss additional features some effectiveness the agency s real world crash data global studies 17 laboratory 18 iv benefits target population projected 13 travel delay property damage savings 26 31 v costs