Data Source: FMCSA Motor Carrier Management Information System (MCMIS) September 26, 2008 snapshot.
In addition, the following MCMIS census file snapshots were used for cross-referencing carrier information:
December 23, 2004, December 23, 2005, December 22, 2006, December 21, 2007 and September 26, 2008.
*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.
†2008 data, as of September 26, 2008