Correct answer
ISA, intelligent speed assistance.
ISA, intelligent speed assistance. It informs the driver of the detected limit and can warn or assist through accelerator feedback or speed control, depending on design. Not every ISA automatically brakes or adjusts speed, and detection can be wrong. The driver remains responsible for signs and a safe speed for rain, visibility, traffic and grip, even below the limit. Start-stop and drowsiness detection serve different purposes.
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The engine start-stop system.
ISA, intelligent speed assistance.
Drowsiness detection without a speed-limit information function.
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