Where Is my billboard going?

Although statistics were very high for favoring 3d billboards, I have decided to create a 2D billboard however not just any 2D billboard. I have contacted stagecoach and they have agreed to put my billboard on the back of their bus. In my research It showed that there are thousands of people traveling to and from school/work via bus. Although the billboard will be at the back of the bus, people waiting at bus stops will see this, also people driving behind the vehicle. It will also attract people passing by. I did debate doing an electronic billboard however I thought the idea of having the billboard on the back of the bus is more quirky and less common.