I get numerous fall alarms especially on two lane roads. Always left side, with or without guard rail, bridge etc. Frequently when car going other direction sets it off, it remains on for several seconds. Thought I might take it in to check.
Wouldn't waste your time if I were you. Your experience is mine + I get it on 4+ lanes with barriers in the middle, and sometimes without anything there. I have videos with barriers and my service manager escalated it to the regional Hyundai field tech. The field tech highlighted the Hyundai CYA phrases like:
"The system may not operate properly due to other factors or circumstances. Always pay attention to your surroundings."
"The detection area differs according to the roads width. If the road is narrow the system may detect other vehicles in the next lane. In addition, if the road is very wide the system may not detect other vehicles."
[under non-operating conditions:]
"A fixed object is near such as a guardrail, tunnel, human and animal etc."
Making sense of the last item depends on how the phrase "non-operating condition" is interpreted. If you take it to mean that the light won't come on, that's clearly false. Whereas if you take it to mean "don't trust BSD alerts" then it's accurate.
I'm done fighting Hyundai. I fought them over the tires for so many months and it's great that there's a program in place now, but between this and my local service department being crap AND not giving a crap, I'm done with Hyundai too (since there's only one service center in the area.)
Overall I love this car and would still highly recommend Genesis sedans to strangers on the internet with good (or even unknown) local service centers. But not mine. My sales rep is a kickass guy too, can't recommend him highly enough, but unfortunately won't any more because seriously, **** that service dept. I'm not blaming Hyundai's BSD policy and I haven't mentioned the service dept's failings here because it doesn't help anyone, but I'm just done.
Fool me once, shame on you. Fool me twice, shame on me. It's been many, many more times than twice. :/