This trick is true to all cars but works best on hybrids due to complete fuel cut off.

Accelerate briskly (but not drag-race quick) to desired speed. The more time spent on acceleration phase, the more fuel wasted.

The target desired speed is slightly above the traffic speed. This will allow you to have lots of opportunity to coast. It is in the coasting phase that you save lots of gas due to fuel cut-off and battery recharging.

In city driving, my Highlander Hybrid is getting consistenly about 34 MPG. More than half of the time, the engine is not running.

At highway speeds, about 30-40 percent of the time, the engine is not receiving fuel while coasting (gliding).