Study: Electronics could stop 40% of big truck rear crashes
Safety features such as automatic emergency braking and forward collision warnings could prevent more than 40% of crashes in which semis rear-end other vehicles, a new study has found.
The Insurance Institute for Highway Safety, a research group supported by auto insurers, also found that when the rear crashes happened, the systems cut the speeds by over 50%, reducing damage and injuries.
The institute called on the federal government to require the systems on new large trucks and said many truck fleet operators are already adding emergency braking on their own.
“Rear-end crashes with trucks and other vehicles happen a lot, often with horrible consequences,” said Eric Teoh, the institute’s director of statistical services who did the study. “This is an important countermeasure to that.”
Trucks with collision warning systems reduced rear crashes by 44%, while automatic emergency braking cut rear crashes by 41%, the study found.
To reach his conclusions, Teoh examined crash data per vehicle mile traveled at 62 trucking companies that use tractor-trailers or other trucks weighing at least 33,000 pounds (15,000 kilograms). The study found about 2,000 crashes that happened over more than 2 billion miles (3.2 billion kilometers) traveled from 2017 through 2019.
The study compared trucks from the same companies that were equipped with collision warning alone, automatic emergency braking, and no crash prevention features at all, the IIHS said.
The IIHS also found that trucks equipped with a collision warning system had 22% fewer crashes than those without either technology. For automatic emergency braking, the figure was 12%.
“This is important information for trucking companies and drivers who are weighing the costs and benefits of these options on their next vehicles,” Teoh said.
The institute says U.S. crashes involving large trucks rose by nearly onethird since hitting a record low in 2009. A total of 4,136 people died in such crashes in 2018, with 119 of the deaths in rear-end crashes.
Two federal agencies that regulate heavy trucks, the Federal Motor Carrier Safety Administration and the National Highway Traffic Safety Administration, said they will review the IIHS report. NHTSA said in a statement that it is nearly finished with a study examining the safety benefits of driver assist technology on heavy vehicles, while the motor carrier administration has been encouraging voluntary use of systems such as automatic emergency braking.
In October of 2015, NHTSA began the regulatory process to evaluate collision warning and automatic braking for heavy trucks.
The American Trucking Associations, an industry group that represents many large carriers, said it supports regulations requiring automatic emergency braking on all new vehicles, both passenger and commercial, after the technology is used over time by fleets and drivers.
Yet the Owner Operator Independent Drivers Association said it can’t accept the study’s conclusions because it did not include realworld factors such as driver training and experience.
AAA and other groups that have studied automatic emergency braking and other driver assist features have found that they don’t work properly all of the time. But Teoh said his study still found that they prevent or mitigate the severity of crashes, and their performance is improving.