TomL
I misspoke...the Subaru Impreza hatchback I drive is the vehicle that subtly beeps when eyesight is activated as I get close to the lines. It's a default in that system.
I happened to drive the Clarity this afternoon and I get a subtle beep while in ACC mode which I use a lot. The subtle beep seems to occur when the system first detects an object in front of you from a distance of about 75 feet. I have the system set to one bar.
I tested this tonight by switching lanes to one with no one ahead of me...then back to other lane with a car X feet ahead of me. The subtle beep occurred Everytime the car went from nothing it could detect to one subtle beep when it noticed the object ~75 feet ahead.
I apologize for the mix-up. I drive 4 vehicles each with it's own safety sense systems.
Hope this helps