Postage Stamps//Futher Ideas

So from my initial ideas of doing the stamps on the idea of efficient driving, i have further explored this. On one of my first ideas i thought of using a road sign as the way the information on the stamp would be displayed, so i have looked into road signs more and further explored this idea, as i think this is best way to design the stamps, either like this or just plain type.

These design sheets, show the thoughts and design of further developing the idea of efficient driving and how i will get this message across on the stamps.