>>509213411 (OP)It's fucking nothing
The ISA regulation provides four options for systems feedback to the driver, from which car manufacturers will be free to choose from:
Cascaded acoustic warning
Cascaded vibrating warning
Haptic feedback through the acceleration pedal
Speed control function
The first two feedback options do not directly intervene but only provide warnings (first optic and if no response from the driver, a delayed acoustic/vibrating warning), which have to be as short as possible in duration to avoid potential annoyance of the driver.
https://road-safety-charter.ec.europa.eu/resources-knowledge/media-and-press/intelligent-speed-assistance-isa-set-become-mandatory-across?utm_source=perplexity