Compared to other advertising channels, vehicle advertising offers the lowest CPM (cost per 1,000 ad impressions) rate. While radio stations and TV channels can be changed and ad-blocking technology is available online, drivers have nowhere to go when they’re stuck in traffic, making charter buses an ideal canvas for advertising. One study shows that the average vehicle graphic generates 101 impressions per mile, and the American Trucking Association published a report that reveals 98% of audiences say that vehicle graphics promote a positive impression of the brand advertised and 29% would make a purchase based on a vehicle advertisement.