What key piece of information does Adaptive Cruise Control (ACC) inherently lack that Intelligent Speed Assistance (ISA) utilizes?

Answer

Knowledge of the legal speed limit

ACC adapts speed based only on the car in front of it, meaning it does not inherently know or care what the legal speed limit is, unlike ISA which uses external references like signs or maps.

What key piece of information does Adaptive Cruise Control (ACC) inherently lack that Intelligent Speed Assistance (ISA) utilizes?
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