NHTSA Complaint #11630243 — 2022 HONDA CIVIC

I rented this car. The adaptive cruise worked great in the daytime, but when it got dark and started to rain, the system started to lose its ability to detect other vehicles. Instead of disabling itself like it should have, the system continued to operate. It often would detect vehicles intermittently, speeding up and slowing down randomly and abruptly. The worst incident was when I was behind an unloaded flatbed semi (again, it was dark and raining.) The car lost track of the semi and accelerated to my set speed. As I got closer, but not THAT close, the car suddenly thought I was much closer than I was and initiated automated emergency braking. It then lost sight of the semi and repeated this cycle a few more times before I turned off cruise control. There was no one behind me, or this could have been a serious accident. I looked in the owner's manual to see how to disable the system and was appalled to see that it uses a single camera instead of a radar. This is obviously unsafe in bad weather, and the system did not disable itself appropriately.