With the significant distances that many semi-trucks travel during a day, it is not surprising that advertising on the side of a semi-truck is a particularly good advertisement place. While driving down the road, you will probably notice thousands of trucks with little to no advertisements on the side. However, this is not to say that each semi-truck will want advertisements on the side. Typically only small businesses will be approachable for such an offer, as larger companies often have a steady cash-flow, and are not interested in any further revenue.