|Top 10 factors cited||Large trucks||Passenger vehicles|
|Failure to yield right-of-way||5.3%||20.3%|
|Ran off road/out of traffic lane||4.8%||27.8%|
|Driving too fast||3.8%||14.9%|
|Failure to obey traffic devices||3.0%||12.1%|
|Making improper turn||1.0%||2.6%|
|Vision obscured by weather||0.9%||1.7%|
NOTES: 1998 is the most recent year for which data are available. Number of drivers involved in two-vehicle, large truck/passenger car crashes = 2,740.
SOURCE: U.S. Department of Transportation, Federal Motor Carrier Safety Administration, Large Truck Crash Profile: The 1998 National Picture (Washington, DC: January 2000).