Definitely yes. And if you're on GT road and see a toll plaza sign ahead e.g "Toll plaza 500m" Just put the car in Neutral and coast your way there. The same applies to Red lights etc.
Proper inflated tires play a big role in fuel efficiency too.
Accelerating slowly is good for better average too, some people rev to 2500 too quickly, and change gear, some reach 2500 slooooowly..
The rest, experts will guide you.