Interesting idea, although the part where the car starts to "accelerate away quickly using automated cruise control", to leave the jam, sounds a bit scary..
Ford Explorers (and possibly other) have adaptive (automated) cruise control. It's not really scary at all because it measures the distance between your car and the car in front of you, and determines the proper speed to drive. It's no different than you performing that calculation in your head and making the correct adjustment to the gas peddle.
Still a bit scary... Did you see the Volvo demo video of the exact same technology you describe go full speed into the back of a truck?
Yes, and "if Captain Sully had been flying an Airbus he would have crashed because they don't allow manual control". The objective is to reduce the total number of crashes, even if that means that you feel like you have less control of when you do crash.