A new study from the Insurance Institute for Highway Safety (IIHS) has found that drivers using adaptive cruise control (ACC) are substantially more likely to speed when using ACC.
“ACC does have some safety benefits, but it’s important to consider how drivers might cancel out these benefits by misusing the system,” says IIHS Statistician Sam Monfort, the lead author of the study. “Speed at impact is among the most important factors in whether or not a crash turns out to be fatal.”
To find out the impact ACC and lane centering technologies have on speeding, IIHS researchers analyzed the behavior of 40 drivers from the Boston metro area over a four-week period using data collected by the Massachusetts Institute of Technology’s Advanced Vehicle Technology Consortium.
Data from the study found that drivers were 24% more likely to drive over the speed limit on limited-access highways when those systems were turned on. IIHS said. The amount by which they exceeded the speed limit when they did speed was also greater when they were using the driver assistance features compared with driving manually.