MKSGR:
SciFrog:

the car detected and stopped when it detected stationary cars at a traffic light. I have not seen any other adaptative cruise control 

Not an expert on these systems but we just had a Volvo S90 as a loaner. This car also comes with this feature. Worked quite well. To start off again you had to press the throttle.

Audi has Traffic Jam Assist and it functions similarly.