EDISON - Over the past two years, Wal-Mart trucks have been involved in 380 crashes, leaving nine people dead. But a review of federal data finds the company's safety record is exceptionally good.

Police say Kevin Roper, the Wal-Mart driver in the crash that seriously injured comedian Tracy Morgan and killed his friend, had been awake for more than 24 hours at the time of the accident. But that is not a widespread problem, according to inspection data from the Federal Motor Carrier Safety Administration. In fact, the FMCSA found that in the past two years, Wal-Mart, which handles its trucking internally, violated hours-of-service rules at a rate of just one in 1,000. Compared with other trucking companies, Wal-Mart ranks in the top half of the top 1 percent.

When it comes to drug and alcohol use by drivers, Wal-Mart's record is perfect, according to the FMCSA, with no cases reported in the past 24 months.

Wal-Mart's record is also impressive when it comes to cases of unsafe driving involving neither overwork nor use of drugs or alcohol. Accident investigations conducted over the past two years found Wal-Mart drivers drove unsafely just 0.5 percent of the time. That places Wal-Mart in the top 3 percent of U.S. trucking firms.