Highway vehicles account for the vast majority of vehicle fires and associated losses.
Ninety-three percent of reported vehicle fires and 92% of vehicle fire deaths involved highway-type vehicles such as cars, trucks, buses, recreational vehicles, and motorcycles. The term “highway vehicle fires” is used to describe the type of vehicle, not the location of the fire. During 2003-2007, the 267,600 highway vehicles reported per year caused an average of 441 civilian deaths, 1,326 civilian fire injuries, and $1.0 billion in direct property damage. On average, 31 highway vehicle fires were reported per hour. These fires killed one person a day. Overall, highway vehicles fires were involved in 17% of reported U.S. fires, 12% of U.S. fire deaths, 8% of U.S. civilian fire injuries, and 9% of the direct property damage from reported fires.
According to the U.S Federal Highway Administration data, roughly 2,980 billion miles were driven, on average, per year on U.S. roads during this period. Roughly 90 highway vehicle fires and 0.15 highway vehicle fire deaths were reported per billion miles driven.
Some form of mechanical failure or malfunction, such as leaks or breaks, backfires, or worn-out parts, contributed to 49% of the highway vehicle fires and 11% of the associated deaths. Electrical failures or malfunctions contributed to 23% of the highway vehicle fires but less than 1% of the associated deaths. Although collisions or overturns were factors in only 3% of the fires, 58% of the deaths resulted from these incidents. Older vehicles were more likely to have a fire caused by mechanical or electrical failures.
Eight percent of the highway vehicle fires were intentionally set. More than half (54%) of these intentional fires originated in the operator or passenger area
Almost two-thirds (64%) of the highway vehicle fires began in the engine, running gear, or wheel area. Thirty-five percent of the associated civilian fire deaths, 46% of the civilian fire injuries, and 53% of the direct property damage resulted from fires that originated in this type of area. Only 2% of the highway vehicle fires started in the fuel tank or fuel line area but these fires caused 18% of the associated deaths.