All hyper mileage tactics need to be done safely.
Shutting off your engine and drifting into traffic as you described is dangerous unless your car is designed to do it automatically.
I applaud their efforts, but I hope these people are not road hazards as well with their driving habits.
Groit hit on a good hyper mile tactic. Traffic and road conditions permitting, waiting until a downhill grade to accelerate is an easy one.
My commute route allows me to gently accelerate to around 55 on my only onramp which is a slight downhill slope. After that there is an uphill grade for about 2 miles before it levels out and another mile later is starts a downhill grade.
If traffic safety permits I'll hold 55 until I get to the hill and accelerate to 65 on the down slope. Doing less than 65 in good weather conditions can be dangerous on that highway and I will gently accelerate on the hill rather than get rear ended. A few mpg is not worth some ones life.
A good week is when I can do that every day. I can see a 2 or 3 mpg boost if all else in my driving is equal.
A lead foot is a killer of mpg.
