Vehicles

This chapter presents information on large trucks involved in fatal, injury, and property damage only crashes. Some of the data in this chapter come from the MCMIS Crash File, which contains data on trucks and buses in crashes that meet the National Governors� Association (NGA)/SAFETYNET recommended threshold. MCMIS data are used for the tables on vehicle configuration (Table 37), crashes by cargo body type (Table 38), gross vehicle weight rating (Table 39), and hazardous materials (Tables 40 and 41). NGA/SAFETYNET nonfatal crashes tend to be more serious than GES nonfatal crashes, because the NGA/SAFETYNET threshold requires at least one injury involving immediate medical attention away from the crash scene, or at least one vehicle disabled as a result of the crash and transported away from the crash scene. Below is a summary of some of the vehicle information in this section:

• In 2005, 4,932 large trucks were involved in fatal crashes, 82,000 were involved in injury crashes, and 354,000 were involved in property damage only crashes.
• Large trucks made up 8 percent of all vehicles in fatal crashes, 3 percent of all vehicles in injury crashes, and 5 percent of all vehicles in property damage only crashes.
• Hazardous materials (HM) placards were present on 4 percent of the large trucks involved in fatal crashes and 2 percent of those in nonfatal crashes. HM was released from the cargo compartments of 13 percent of the placarded trucks.
• “Collision with motor vehicle in transport” was recorded as the most harmful event for 76 percent of the large trucks involved in fatal crashes.
• Singles (truck tractors pulling a single semi-trailer) accounted for 62 percent of the large trucks involved in fatal crashes. Doubles (tractors pulling two trailers) made up 3 percent of the large trucks involved in fatal crashes. Triples (tractors pulling three trailers) accounted for 0.1 percent of all large trucks involved in fatal crashes in 2005.