The AAA is warning that automatic emergency braking systems with pedestrian detection can be unreliable.

The AAA says the latest test results show cars that have automatic emergency braking systems with pedestrian detection don't always work as drivers may expect them to. 

“We found that where a child darts out between parked cars, that the technologies did not work 89% of the time,” says Robert Sinclair Jr., of AAA Northeast.

The automatic braking technology is found in some new cars and is supposed to stop or slow down a car if a person is detected. AAA says it tested four new sedans in multiple situations and speeds, and the majority of the time they failed. At night, it says none of the cars stopped. 

The AAA says the technology is a good thing and can stop a vehicle in certain circumstances, but the group is warning drivers to make sure they don't fully rely on this technology. 

“The times it does work, it’s fantastic. Going forward, more research will be done certainly, and we're looking forward to the time when these technologies can be relied on 100%,” says Sinclair Jr.