That's there already, I think? I believe I triggered it once. Although it sounded to be exactly like the front distance warning, I'm pretty sure it was freaked out about an adjacent lane because it was a vehicle behind and to my right that was lit up red on the display.
It's not something that will come up often though, if you're doing a good job of mirror and shoulder checking. It was something of a false positive in this case, I think. I knew the other vehicle was there, I don't believe I was going into a bad position. Frankly I'm unclear on exactly why the alarm triggered. I don't have video to review and it's not something that's easy to test/reproduce.