During simulated rain, 17% of test runs resulted in accidents at speeds up to 25 mph (40 km/h), which increased to 33% at speeds up to 35 mph (56 kph).
see photosIn the AAA study, no test car collided with a stopped vehicle under ideal conditions.
Moderate and heavy rain significantly impairs the performance of advanced driver-assistance technology used to help vehicles automatically brake and stay in the lane, a study by the American Automobile Association showed Thursday. .
Researchers from the AAA, a consortium of North American motor clubs, found that vehicles’ auto emergency braking systems, in many instances during simulated rain, no longer recognized vehicles stalled ahead and that vehicles’ lane-keeping systems performed significantly worse. has done.
This could lead to dangerous situations if drivers rely too heavily on systems whose performance is typically evaluated under ideal conditions, the researchers said.
“The reality is that people aren’t always driving in perfect, sunny weather, so we must expand testing and take into account the things that people really struggle with in their day-to-day driving,” says AAA. Greg Brannan, director of automotive engineering and industry relations, said in a statement.
ADAS are becoming more common in new vehicles.
Advanced driver-assistance systems, or ADAS, are becoming more common in new vehicles. They do not offer autonomous driving, but can automate limited driving tasks.
Auto emergency braking is increasingly provided as a standard feature in new cars and has been shown to significantly reduce rear-end crashes in tests by insurance groups.
In the AAA study, no test car collided with a stopped vehicle under ideal conditions. But during simulated rain, 17% of test runs resulted in crashes at speeds of up to 25 mph (40 km/h), up from 33% at speeds up to 35 mph (56 kph).
The pavement was dry during the rain test and the researchers noted that wet roads could result in an even higher accident rate. Vehicles equipped with lane-keeping technology passed lane markers 37% of the time under ideal conditions in the AAA test, but that rate increased to 69% after rain added.
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The group tested the 2020 Buick Enclave Avenir, 2020 Hyundai Santa Fe, 2020 Toyota RAV4 and the 2020 Volkswagen Tiguan.
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