Data Source: FMCSA Motor Carrier Management Information System (MCMIS) December 16, 2011 snapshot.
In addition, the following MCMIS census file snapshots were used for cross-referencing carrier information:
December 21, 2007, December 19, 2008, December 18, 2009, December 17, 2010 and December 16, 2011.
*Driver OOS rate is based on inspection levels I, II, III and VI.
Vehicle OOS rate is based on inspection levels I, II, V and VI.
HM OOS rate is based on inspection levels I, II, III and VI when HM is present.
†2011 data, as of December 16, 2011