You mean this?
So by constantly accelerating and then braking, you're actually causing a ripple effect which can last for miles and miles.
Exactly.
The typical average speed for maximum traffic flow is around 17MPH.
Next time you come across the stop/start motorway jam, just stick to 15-17
What you will find is that initially, the traffic will pull away from you. Then it will stop,
You will slowly catch up with it (At 15-17) and just as you get there it will magically start moving again.
Rinse and repeat...
Those ahead of you will have all the frustration/fuel consumption and agro associated with stop starting (And the very real risk of an accident)
Those behind will all travel all the way through the congested area at a steady 15-17 which is far less stressful, far safer, and uses far less fuel...