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AEB with pedestrian detection really works, except at night



Automatic emergency brake (AEB) has been around for a while, and it has quietly become more advanced with systems that add pedestrian detection. In fact, according to IIHS, conducted the research we are about to discuss, from 2019 to the 2021 model year, pedestrian AEB availability has increased from 3 out of 5 models sold to 9 out of 10. Not only that, but the organization has found that multiple systems work well, and they have significantly reduced the number of pedestrian collisions. But it turns out they have a few blind spots, mostly in dark conditions.

The first is the good news. AEB with pedestrian detection works really well. The IIHS study found that overall, cars with such systems had 27% fewer collisions with pedestrians than cars without such systems. Additionally, the system performed well during the day and in areas with street lights, with crash rates 32% and 33% lower, respectively. And when there are collisions with pedestrians, less than 30% of them cause injuries.

Now for the bad news. The IIHS found that the systems made no difference in reducing pedestrian collisions at night in low-light or low-light conditions. That’s not good, as the organization also notes that 75% of fatal pedestrian crashes happen in those exact situations. IIHS also tested eight small SUVs in daylight, artificial light, and darkness. Most vehicles have much worse performance in the dark, not slowing down as much as they would if they had good visibility.

There are also other weaknesses. While the IIHS found that pedestrian AEB worked well on roads with speed limits of 35 mph or less, it didn’t make much of a difference on roads with speeds above 50 mph. These systems also don’t make any real difference in crashes that happen while the vehicle is turning.

But now we come back to some good news. There are a few SUVs that IIHS tested in this small group that still perform well in the dark – a Toyota C-HR life 2021 and Ford Bronco Sport 2021, both use a combination of camera and radar – and the organization notes that automakers can already be improving in these areas. IIHS will also begin testing these systems in the dark for all cars to inform consumers and also to encourage automakers to improve in these areas. Automakers are also upgrading the automatic emergency feature brake system to check the angles during turns so they are more effective in those situations.

In short, automatic emergency braking with pedestrian detection is really helpful in reducing pedestrian collisions and less harmful when they do occur. And while they have their weaknesses, both independent testing agencies and automakers seem to be aware of them and working to improve.

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