Adaptive cruise control can maintain a set speed like conventional cruise control, but it can also vary speed based on traffic flow. (digitaltrends.com)
As with conventional cruise control, ACC will maintain, within close limits, a «set speed» as selected by the driver. (sybarites.com)
The adaptive cruise control, which operates all the way to a stop and can then accelerate again, can be turned off, leaving conventional cruise control. (cars.com)